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Hewlett Packard LaserJet 1018 Service Manual

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HP LaserJet 1018
Service Manual
HP LaserJet 1018 printer
Service Manual
Copyright Information
© 2006 Copyright Hewlett-Packard
Development Company, L.P.
Reproduction, adaptation or translation
without prior written permission is
prohibited except as allowed under the
copyright laws.
The information contained in this document
is subject to change without notice.
The only warranties for HP products and
services are set forth in the express
warranty statements accompanying such
products and services. Nothing herein
should be construed as constituting an
additional warranty. HP shall not be liable
for technical or editorial errors or omissions
contained herein.
Part number CB419-90938
Edition 1, 4/2006
Information regarding FCC Class B, Parts
15 and 68 requirements can be found in
the user guide.
NOTICE TO U.S. GOVERNMENT USERS:
RESTRICTED RIGHTS COMMERCIAL
COMPUTER SOFTWARE: “Use,
duplication, or disclosure by the
Government is subject to restrictions as set
forth in subparagraph (c) (1)(ii) of the
Rights in Technical Data Clause at DFARS
52.227-7013.”
Trademark Credits
Microsoft
®
and Windows
®
are U.S.
registered trademarks of the Microsoft
company.
Safety Information
WARNING!
Potential Shock Hazard
Always follow basic safety precautions
when using this product to reduce risk of
injury from fire or electric shock.
Read and understand all instructions in the
user guide.
Observe all warnings and instructions
marked on the product.
Use only a grounded electrical outlet when
connecting the HP LaserJet 1018 printer to
a power source. If you don’t know whether
the outlet is grounded, check with a
qualified electrician.
Do not touch the contacts on the end of
any of the sockets on the
HP LaserJet 1018 printer. Replace
damaged cords immediately.
Unplug this product from wall outlets
before cleaning or servicing.
Do not install or use this product near
water or when you are wet.
Install the product securely on a stable
surface.
Install the product in a protected location
where no one can step on or trip over the
power cord and the power cord will not be
damaged.
If the product does not operate normally,
see the online user guide (CB419–90901).
Table of contents
1 Product Information
Product configuration ............................................................................................................................. 2
Overview of product ............................................................................................................................... 3
HP LaserJet 1018 printer ...................................................................................................... 3
Model and serial numbers .................................................................................................... 5
Hardware description ............................................................................................................ 5
Firmware description ............................................................................................................. 5
Product specifications ............................................................................................................................ 6
Physical specifications .......................................................................................................... 6
Printer performance .............................................................................................................. 6
Environmental specifications ................................................................................................ 6
Electrical specifications ......................................................................................................... 7
Acoustic emissions ............................................................................................................... 8
Extended service plan ........................................................................................................................... 9
Print-cartridge information ................................................................................................................... 10
Refilled print cartridges ...................................................................................................... 10
Recycling print cartridges .................................................................................................. 10
Regulatory information ........................................................................................................................ 11
FCC compliance ................................................................................................................. 11
Canadian DOC regulations ................................................................................................. 11
Korean EMI statement ........................................................................................................ 11
Laser statement for Finland ................................................................................................ 12
2 Installation and operation
Operating environment ........................................................................................................................ 14
Identifying the control-panel components ........................................................................................... 15
Media specifications ............................................................................................................................ 16
Supported media sizes ....................................................................................................... 16
Guidelines for using media .................................................................................................................. 17
Paper and transparencies ................................................................................................... 17
Common media problems table .......................................................................................... 17
Labels .................................................................................................................................. 18
Envelopes ........................................................................................................................... 18
Envelopes with double-side seams .................................................................... 18
Envelopes with adhesive strips or flaps ............................................................. 19
Card stock and heavy media .............................................................................................. 20
Card-stock construction ..................................................................................... 20
Card-stock guidelines ......................................................................................... 20
Loading media ..................................................................................................................................... 21
ENWW iii
Main input tray .................................................................................................................... 21
Priority feed slot .................................................................................................................. 21
Specific types of media ....................................................................................................... 21
Setting media types ............................................................................................................................. 22
Set the media type .............................................................................................................. 22
3 Maintenance
Life expectancies of parts that wear .................................................................................................... 24
Cleaning the product ........................................................................................................................... 25
Cleaning the print path ........................................................................................................ 26
Cleaning the print-cartridge area ........................................................................................ 26
Cleaning the pickup roller ................................................................................................... 29
User-replaceable parts ........................................................................................................................ 30
Replacing the pickup roller ................................................................................................. 30
Replacing the separation pad ............................................................................................. 33
Replacing the main input tray (paper-pickup tray assembly) ............................................. 35
Replacing the output-bin extension (delivery-tray assembly) ............................................. 36
4 Operational overview
Basic functions ..................................................................................................................................... 38
Formatter system ................................................................................................................................. 39
Central processing unit ....................................................................................................... 39
RAM .................................................................................................................................... 39
USB interface ...................................................................................................................... 39
Control panel ....................................................................................................................... 39
Draft mode (EconoMode) ................................................................................................... 39
HP Memory Enhancement technology (MEt) ..................................................................... 39
Enhanced I/O ...................................................................................................................... 40
Printer functions ................................................................................................................................... 41
Engine control system (engine control unit and power assembly) ..................................... 42
Printer-engine-control system ............................................................................ 42
Printer laser/scanner unit ................................................................................... 43
Power system on the engine power assembly .................................................. 44
Image-formation system ..................................................................................................... 45
The seven image-formation processes .............................................................. 46
Print cartridge ...................................................................................................................... 47
Printer paper-feed system .................................................................................................. 47
Jam detection ...................................................................................................................... 49
Conditions of jam detection ................................................................................ 49
Solenoid, sensors, switches, and motor ............................................................................. 50
Basic sequence of operation (formatter-to-printer) ............................................................. 51
5 Removal and replacement
Removal and replacement strategy ..................................................................................................... 54
Required tools ..................................................................................................................... 54
Before performing service ................................................................................................... 54
Print cartridge ...................................................................................................................... 55
Parts removal order ............................................................................................................ 56
User-replaceable parts ........................................................................................................................ 57
iv ENWW
Replacing the pickup roller ................................................................................................. 57
Replacing the separation pad ............................................................................................. 60
Replacing the main input tray (paper-pickup tray assembly) ............................................. 62
Replacing the output-bin extension (delivery-tray assembly) ............................................. 63
Covers ................................................................................................................................................. 64
Right-side cover .................................................................................................................. 64
Left-side cover .................................................................................................................... 66
Rear panel and top-cover assembly ................................................................................... 66
Front cover .......................................................................................................................... 71
Internal assemblies .............................................................................................................................. 73
Transfer-roller assembly ..................................................................................................... 73
Engine-power assembly ..................................................................................................... 75
Fuser (fixing) assembly ....................................................................................................... 77
Paper-pickup assembly ...................................................................................................... 79
Engine control unit (ECU) assembly ................................................................................... 80
Laser/scanner assembly ..................................................................................................... 84
6 Troubleshooting
Basic troubleshooting .......................................................................................................................... 86
Troubleshooting checklist ................................................................................................... 86
Control-panel lights .............................................................................................................................. 88
Status-light patterns ............................................................................................................ 88
Jams .................................................................................................................................................... 90
Clearing jams ...................................................................................................................... 90
Typical media jam locations ............................................................................... 90
Removing a jammed page ................................................................................. 90
Print-quality troubleshooting ................................................................................................................ 93
Print-cartridge problems ..................................................................................................... 93
Checking the print cartridge ............................................................................... 93
To redistribute toner in the print cartridge ......................................... 93
Solving print-quality problems ............................................................................................. 93
Solving paper-feed problems ............................................................................................................ 105
Functional checks .............................................................................................................................. 107
Half self-test functional check ........................................................................................... 107
To perform a half self-test check ...................................................................... 107
To perform other checks .................................................................................. 107
Drum-rotation functional check ........................................................................................ 109
High-voltage-contacts check ............................................................................................. 110
To check the print-cartridge contacts ............................................................. 110
To check the printer high-voltage contacts ..................................................... 111
Troubleshooting tools ........................................................................................................................ 112
Repetitive-image-defect ruler ............................................................................................ 112
Circuit diagram .................................................................................................................. 113
Solenoid, sensors, switches, and motor ............................................................................................ 114
7 Parts and diagrams
Ordering parts and supplies .............................................................................................................. 116
Parts .................................................................................................................................. 116
Related documentation and software ............................................................................... 116
Parts that wear ................................................................................................................. 116
ENWW v
Accessories and consumables .......................................................................................................... 117
Accessories ....................................................................................................................... 117
Common hardware ........................................................................................................... 118
How to use the parts lists and diagrams ........................................................................... 118
Printer exchange/parts ...................................................................................................................... 119
Major components ............................................................................................................................. 122
Alphabetical parts list ......................................................................................................................... 124
Numerical parts list ............................................................................................................................ 126
Index .................................................................................................................................................................. 129
vi ENWW
1 Product Information
This chapter provides general product information for the HP LaserJet 1018 printer.
●
Product
configuration
●
Overview
of
product
●
Product
specifications
●
Extended
service
plan
●
Print-cartridge
information
●
Regulatory
information
ENWW 1
Product configuration
The HP LaserJet 1018 printer (HP LJ 1018) offers the following features:
●
Prints up to 12 ppm
●
10 seconds or less to first page out
● FastRes 1200: 1200 dpi effective output quality (600 x 600 x 2 dpi with HP Resolution
Enhancement technology [REt])
●
150-sheet input capacity (75-g/m
2
[20-lb] media)
● 125-sheet output bin capacity
●
A priority feed slot
●
EconoMode (saves toner)
●
Prints watermarks, booklets, and multiple pages per sheet (N-up), and can print the first page
on different media from the remainder of the document
●
2 MB of RAM
● 2,000-page print cartridge
● A USB 2.0 Hi-Speed port
2 Chapter 1 Product Information ENWW
Overview of product
HP LaserJet 1018 printer
Figure 1-1 Front and right-side view
1
Attention light
2
Ready light
3
Print-cartridge door
4
Output-media support
5
Priority feed slot
6
150-sheet main input tray
7
Output bin
ENWW Overview of product 3
10
8
9
11
Figure 1-2 Back and left-side view
8
On/off switch
9
Power receptacle
10
USB port
11
Separation pad
4 Chapter 1 Product Information ENWW
Model and serial numbers
The model number and serial number are listed on an identification label located on the back of the
product.
The serial number contains information about the country/region of origin, and the revision level,
production code, and production number of the product.
The label also contains power-rating and regulatory information.
Figure 1-3 Model- and serial-number label (HP LJ 1010 printer is shown)
Hardware description
The HP LaserJet 1018 printer offers HP REt technology for 600 x 600 x 2 dpi printing (effectively
1200 dpi).
The printer prints up to 12 ppm. With an effective 1200 dpi printing resolution, the printer has
exceptional text and graphics print quality. The simple control panel and improved paper-handling
make this printer easy to use.
The main input tray has a 150-sheet (75-g/m
2
[20-lb] media) capacity for continuous, multiple-page
printing. The priority feed slot is used to manually feed single sheets of most recommended media
and holds up to ten sheets of 75-g/m
2
(20-lb) media. Both the main input tray and the priority feed
slot are center-justified for all supported media sizes. The output bin holds up to 125 sheets of 75-g/
m
2
(20-lb) media.
This printer has a very fast first-page-out, at less than 10 seconds to first page out. The base
memory is 2 MB, and the printer uses an embedded 133 MHz processor.
The print engine has an average duty cycle of 1,000 pages per month (7,000 peak) or 50,000 total
pages printed. The standard replacement print-cartridge life is 2,000 pages, in accordance with ISO/
IEC 19752.
NOTE Actual print cartridge life depends on specific usage.
Firmware description The firmware in the printer includes these features:
● Host-based printing
●
EconoMode functionality
ENWW Overview of product 5
Product specifications
This section lists the specifications for the HP LaserJet 1018 printer.
Physical specifications
Table 1-1 Physical specifications
Model
Height
Depth
Width
Weight
HP LaserJet 1018 printer 209 mm
(8.3 inches)
242 mm
(9.5 inches)
370 mm
(14.6 inches)
5.9 kg (13.0 lb)
Printer performance
Table 1-2 Performance
Model
Print resolution (normal)
Print speed (A4-size media)
HP LaserJet 1018 printer
600 x 600 dpi 1
12 ppm
1
1200 dpi effective output quality, 600 x 600 x 2 dpi with HP Resolution Enhancement technology (REt)
Environmental specifications
Table 1-3 Environmental specifications (HP LJ 1018 printer) Category Specification
Operating environment (unit plugged into an alternating-
current [ac] outlet)
●
Temperature: 10° to 32.5°C (50° to 90.5°F)
●
Humidity: 20 to 80% relative humidity (no condensation)
Storage environment (unit not plugged into an ac outlet) ● Temperature: 0° to 40°C (32° to 104°F)
●
Humidity: 10 to 80% relative humidity (no condensation)
6 Chapter 1 Product Information ENWW
Electrical specifications
WARNING!Power requirements are based on the country/region where the printer is sold.
Do not convert operating voltages. This might damage the printer and void the product
warranty.
Table 1-4 Power requirements
Specification
110-volt models
220-volt models
Power requirements
110–127 V (±10%)
50/60 Hz (±2 Hz)
220–240 V (±10%)
50/60 Hz (±2 Hz)
Rated current 4.0 amps 2.3 amps
WARNING!Power sources are not interchangeable.
Table 1-5 Power consumption (average, in watts)
1
Product model
Printing
2
Ready
2
PowerSave
Off
HP LaserJet 1018
printer
250 W
4 W
4 W
0 W
1
Values are subject to change. See http://www.hp.com/
support/lj1018 for current information.
2
Power reported is highest value measured for printing using all standard voltages. HP LaserJet 1018 printer print speed is
12 ppm.
ENWW Product specifications 7
Acoustic emissions
Table 1-6 Acoustic emissions
1
Sound power level
Declared per ISO 9296
Printing
L
WAd
= 6.2 Bels (A) [62 dB (A)]
Ready
Inaudible
Sound pressure level—Bystander position
Declared per ISO 9296
Printing
L
pAm
= 49 dB (A)
Ready
Inaudible
1
Values are subject to change. See http://www.hp.com/
support/lj1018 for current information. Configuration tested:
HP LaserJet 1018 printer using the standard tray, A4 paper, and simplex, continuous printing. During other operations,
acoustic emissions might vary.
8 Chapter 1 Product Information ENWW
Extended service plan
In most countries/regions, extended service plans are available for hardware and technical support
coverage for terms of up to three years. The service plan must be purchased during the hardware
product's period of original warranty validity (typically one year).
ENWW Extended service plan 9
Print-cartridge information The print cartridge is designed to simplify replacement of the major consumable parts. The print
cartridge contains the printing mechanism and a supply of toner.
The HP LaserJet 1018 ships with a 1000-page introductory print cartridge. The standard replacement
print-cartridge life is 2,000 pages, in accordance with ISO/IEC 19752.
NOTE Actual print cartridge life depends on specific usage.
Refilled print cartridges While Hewlett-Packard does not prohibit the use of refilled print cartridges during the warranty period
or while the product is under a maintenance contract, use of refilled cartridges is not recommended
for the following reasons:
●
Repairs resulting from the use of refilled cartridges are not covered under Hewlett-Packard
warranty or maintenance contracts.
●
Hewlett-Packard has no control or process to ensure that a refilled cartridge functions at the
high level of reliability of a new HP LaserJet print cartridge. Hewlett-Packard also cannot predict
the long-term reliability effect on the product from using the different toner formulations that are
found in refilled cartridges.
● The print quality of HP LaserJet print cartridges influences the customer’s perception of the
product. Hewlett-Packard has no control over the actual print quality of a refilled cartridge.
● Parts that are critical to print quality might not be replaced when the cartridge is refilled with
toner.
Recycling print cartridges In order to reduce waste, Hewlett-Packard offers a recycling program. Cartridge components that do
not wear out are recycled. Plastics and other materials are recycled. Hewlett-Packard pays the
shipping costs from the user to the recycling plant (within the United States). To join this recycling
effort, follow the instructions inside the print cartridge box. See http://www.hp.com/
recycle for more
information.
10 Chapter 1 Product Information ENWW
Regulatory information
FCC compliance
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses, and can
radiate radio frequency energy. If it is not installed and used in accordance with the instructions, it
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following
measures:
● Reorient or relocate the receiving antenna.
● Increase separation between equipment and receiver.
● Connect equipment to an outlet on a circuit different from that to which the receiver is located.
●
Consult your dealer or an experienced radio/TV technician.
NOTE Any changes or modifications to the printer that are not expressly approved by
Hewlett- Packard could void the user's authority to operate this equipment. Use of a shielded
interface cable is required to comply with the Class B limits of Part 15 of FCC rules.
Canadian DOC regulations
Complies with Canadian EMC Class B requirements.
«Conforme á la classe B des normes canadiennes de compatibilité électromagnétiques. «CEM».»
Korean EMI statement
ENWW Regulatory information 11
Laser statement for Finland
LASERTURVALLISUUS
LUOKAN 1 LASERLAITE
KLASS 1 LASER APPARAT
HP LaserJet 1018 -laserkirjoitin on käyttäjän kannalta turvallinen luokan 1 laserlaite.
Normaalissa käytössä kirjoittimen suojakotelointi estää lasersäteen pääsyn laitteen
ulkopuolelle. Laitteen turvallisuusluokka on määritetty standardin EN 60825-1 (1994)
mukaisesti.
VAROITUS!
Laitteen käyttäminen muulla kuin käyttöohjeessa mainitulla tavalla saattaa altistaa
käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle.
VARNING!
Om apparaten används på annat sätt än i bruksanvisning specificerats, kan användaren
utsättas för osynlig laserstrålning, som överskrider gränsen för laserklass 1.
HUOLTO
HP LaserJet 1018 -kirjoittimen sisällä ei ole käyttäjän huollettavissa olevia kohteita.
Laitteen saa avata ja huoltaa ainoastaan sen huoltamiseen koulutettu henkilö. Tällaiseksi
huoltotoimenpiteeksi ei katsota väriainekasetin vaihtamista, paperiradan puhdistusta tai
muita käyttäjän käsikirjassa lueteltuja, käyttäjän tehtäväksi tarkoitettuja ylläpitotoimia, jotka
voidaan suorittaa ilman erikoistyökaluja.
VARO!
Mikäli kirjoittimen suojakotelo avataan, olet alttiina näkymättömälle lasersäteilylle laitteen
ollessa toiminnassa. Älä katso säteeseen.
VARNING!
Om laserprinterns skyddshölje öppnas då apparaten är i funktion, utsättas användaren för
osynlig laserstrålning. Betrakta ej strålen. Tiedot laitteessa käytettävän laserdiodin
säteilyominaisuuksista:
Aallonpituus 785-800 nm
Teho 5 mW
Luokan 3B laser
12 Chapter 1 Product Information ENWW
2 Installation and operation
This chapter provides an overview of the appropriate operating environment, describes the control
panel, describes media requirements, and describes how to load print media.
●
Operating
environment
●
Identifying
the
control-panel
components
●
Media
specifications
●
Guidelines
for
using
media
●
Loading
media
●
Setting
media
types
ENWW 13
Operating environment Place the product on a sturdy, level surface in a well-ventilated area that meets the following
environmental requirements:
●
Temperature: 10° to 32.5°C (50° to 90.5°F)
●
Humidity: 20 to 80% relative humidity (no condensation)
●
Away from direct sunlight, open flames, and ammonia fumes
● With sufficient space around the product to accommodate access and ventilation requirements
Figure 2-1 HP LaserJet 1018 printer dimensions
14 Chapter 2 Installation and operation ENWW
Identifying the control-panel components
The printer control panel has two lights. These lights produce patterns that identify printer status.
Figure 2-2 Control-panel lights
1
Attention light: Indicates that the print-cartridge door is open, print cartridge is missing, and other errors.
2
Ready light: Indicates that the printer is ready to print.
ENWW Identifying the control-panel components 15
Media specifications
The printer accepts a variety of media. Properties such as weight, grain, and moisture content are
important factors that affect printer performance and output quality. Media should conform to the
guidelines in the User Guide. Media that does not meet HP guidelines might cause poor print quality,
increased media jams, or premature wear on the printer, which might require printer repair.
CAUTION Damage that is caused by using media that does not meet HP specifications is
not covered by the HP warranty or service agreements.
Supported media sizes
The printer supports media within this size range:
●
Minimum: 76 x 127 mm (3 x 5 inches)
●
Maximum: 216 x 356 mm (8.5 x 14 inches)
Table 2-1 Media sizes
Paper type
Metric
English
Letter
216 x 279 mm
8.5 x 11 inches
Legal
216 x 356 mm
8.5 x 14 inches
Executive
184 x 267 mm
7.25 x 10.5 inches
A4
210 x 297 mm
8.25 x 11.75 inches
COM10 envelopes
105 x 241 mm
4.13 x 9.5 inches
DL envelopes
110 x 220 mm
4.33 x 8.67 inches
C5 envelopes
162 x 229 mm
6.4 x 9 inches
B5 envelopes
176 x 250 mm
6.9 x 9.85 inches
Monarch envelopes
98.5 x 191 mm
3.88 x 7.5 inches
Labels
216 x 279 mm
(8.5 x 11 inches)
Custom-size media custom (within acceptable range) custom (within acceptable range)
NOTE Narrow and heavy media can cause the printer to print more slowly.
16 Chapter 2 Installation and operation ENWW
Guidelines for using media
HP LaserJet printers produce documents that have excellent print quality. They can print on a variety
of media types, such as paper (including up to 100% recycled fiber content paper), envelopes,
labels, transparencies, and custom-sized media.
Paper and transparencies Paper must be of good quality and free of cuts, nicks, tears, spots, loose particles, dust, wrinkles,
holes, and curled or bent edges. Check the label on the paper package for details about the type of
paper (such as bond or recycled).
Some paper causes print-quality problems, jamming, or damage to the printer.
NOTE Do not use letterhead that is printed with low-temperature inks, such as those used in
some types of thermography, raised letterhead, or colored paper or preprinted forms that use
inks incompatible with the printer temperature, which is 200°C (392°F) for 0.1 second.
Transparencies must be able to withstand 200°C (392°F), the maximum print temperature.
Common media problems table Symptom
Problem with paper
Solution
Poor print quality or toner adhesion, or
problems with feeding
Too moist, too rough, too smooth,
embossed, or from a faulty paper lot
The correct media type is not selected
in the Printer Properties dialog box.
Try another kind of paper that is
between 100 and 250 Sheffield and
has 4% to 6% moisture content.
Select the correct media type. See
Setting
media
types
on
page
22.
Dropouts, jamming, or curl
Stored improperly
Store paper flat in its moisture-proof
wrapping.
Increased gray background shading
Might be too heavy
Use lighter paper.
Excessive curl, or problems with feeding
Too moist, wrong grain direction, or
short-grain construction
Use long-grain paper or change the
media type to light.
Jamming, or damage to printer
Cutouts or perforations
Damaged media
Do not use paper that has cutouts or
perforations.
Do not use media that has been
previously run through a printer or
copier.
Problems with feeding
Ragged edges
Use good-quality paper.
Moisture on the trailing edge of the
paper
Too moist (media is steaming when it
exits the printer)
Store paper in a low humidity area or
air tight container or change the media
type to light.
ENWW Guidelines for using media 17
Labels
When selecting labels, consider the following factors:
● Adhesives: The adhesive material should be stable at 200°C (392°F), the printer’s maximum
temperature.
● Arrangement: Only use labels with no exposed backing between them. Labels can peel off
sheets that have spaces between the labels, causing serious jams.
●
Curl: Before printing, labels must lie flat with no more than 13 mm (0.5 inch) of curl in any
direction.
●
Condition: Do not use labels with wrinkles, bubbles, or other indications of separation. Never
use a sheet of labels that has already been sent through the printer.
Envelopes Envelope construction is critical. Envelope fold lines can vary considerably, not only between
manufacturers but also within a box from the same manufacturer. Successful printing on envelopes
depends on the quality of the envelopes. When selecting envelopes, consider the following factors:
●
Weight: The weight of the envelope paper should not exceed 105 g/m
2
(28 lb), or jamming
might result.
● Construction: Before printing, envelopes should lie flat with less than 6 mm (0.25 inch) curl and
should not contain air. Envelopes that trap air may cause problems.
● Condition: Make sure that the envelopes are not wrinkled, nicked, or otherwise damaged.
●
Sizes: From 90 x 160 mm (3.5 x 6.3 inches) to 178 x 254 mm (7 x 10 inches).
Store envelopes flat. If air is trapped in an envelope, creating an air bubble, the envelope might
wrinkle during printing.
Envelopes with double-side seams
An envelope with double-side-seam construction (vertical seams at both ends of the envelope rather
than diagonal seams) is more likely to wrinkle. Make sure the seam extends all the way to the corner
of the envelope as shown in top figure of the following illustration:
18 Chapter 2 Installation and operation ENWW
Envelopes with adhesive strips or flaps
Envelopes with a peel-off adhesive strip or with more than one flap that folds over to seal must use
adhesives compatible with the heat and pressure in the printer: 200°C (392°F). The extra flaps and
strips might cause wrinkling, creasing, or jams.
ENWW Guidelines for using media 19
Card stock and heavy media For optimum performance, do not use paper heavier than 157-g/m 2
(42-lb). Paper that is too heavy
might cause misfeeds, stacking problems, jams, poor toner fusing, poor print quality, or excessive
mechanical wear.
Card-stock construction
●
Smoothness: 135- to 157-g/m
2
(36- to 42-lb) card stock should have a smoothness rating of
100 to 180 Sheffield. 60- to135-g/m
2
(16- to 36-lb) card stock should have a smoothness rating
of 100 to 250 Sheffield.
● Construction: Card stock should lie flat with less than 5 mm (0.2 inch) of curl.
●
Condition: Make sure that the card stock is not wrinkled, nicked, or otherwise damaged.
●
Sizes: Only use card stock within the following size ranges:
● Minimum: 76 x 127 mm (3 x 5 inches)
● Maximum: 216 x 356 mm (8.5 x 14 inches)
Card-stock guidelines
●
Set margins at least 2 mm (0.08 inch) away from the edges.
20 Chapter 2 Installation and operation ENWW
Loading media
Loading media in the HP LaserJet 1018 printer is simple and straightforward.
This section describes loading bulk media.
Main input tray
The main input tray holds up to 150 sheets of 75-g/m
2
(20-lb) paper or a 25 mm (0.98 inch) stack of
heavier media. Load media with the top forward and the side to be printed on facing up. To prevent
jams and skew, always adjust the side and rear media guides.
Priority feed slot
Use the priority feed slot to feed a single sheet of a recommended media for manual feeding and
special operations. It can hold up to ten pages of 75-g/m
2
(20-lb) paper, but is best used for feeding
one sheet at a time of paper, heavier paper (163-g/m
2
[42-lb]), or card stock, or a single envelope or
transparency. Load media with the top forward and the side to be printed facing up. To prevent jams
and skew, always adjust the side media guides.
If you try to print on media that is wrinkled, folded, or damaged in any way, a jam might occur. See
Jams
on
page
90.
NOTE When you add new media, make sure that you remove all of the media from the input
tray and straighten the stack of new media. This helps prevent multiple sheets of media from
feeding through the printer at one time, and therefore reduces jams.
Specific types of media ● Transparencies and labels: Load transparencies and labels with the top forward and the side
to be printed facing up. See the user guide for more information.
● Envelopes: Load envelopes with the narrow, stamp side forward and the side to be printed
facing up. See the user guide for more information.
● Letterhead or preprinted forms: Load with the top forward and the side to be printed facing
up. See the user guide for more information.
● Cards and custom-sized media: Load with the narrow side forward and the side to be printed
facing up. See the user guide for more information.
ENWW Loading media 21
Setting media types
Use the procedure in this section to select the correct type of media for the print job. An incorrect
media type setting might cause image-quality problems.
Set the media type
1.Open the Printer Properties dialog box.
2.Click Printer Preferences.
3.Select the correct media type from the Type Is drop down menu.
4.Click OK to close the Printer Preferences dialog box.
5.Click OK to close the Printer Properties dialog box.
22 Chapter 2 Installation and operation ENWW
3 Maintenance
This chapter describes the life expectancy of parts that wear, printer cleaning, printer maintenance,
and the replacement of user-replaceable parts.
●
Life
expectancies
of
parts
that
wear
●
Cleaning
the
product
●
User-replaceable
parts
ENWW 23
Life expectancies of parts that wear Inspect any parts that wear when servicing the product. Replace them as needed, based on failure or
wear rather than on usage.
The following table lists approximate schedules for replacing consumables.
Table 3-1 Life expectancies of parts that wear
Description
Part number
Life (estimated)
Remarks
Replacement print cartridge
(user-replaceable) Q2612A
2,000 pages
NOTE The
declared cartridge
yield value is stated
in accordance with
ISO/IEC 19752. For
more information,
see
http/
/:www.hp.com/
go/pageyield.
When print becomes faint,
redistribute the toner in the
cartridge by gently rotating
the cartridge, or replace the
cartridge.
Pickup roller
RL1-0266-000CN
50,000 pages
Affects paper pickup
Printer separation pad RM1-0648-000CN
50,000 pages
Affects paper separation
(feeding one page at a time)
Fuser assembly (110–127 V)
RM1-2086-000CN
50,000 pages
Can affect print quality and
paper movement
Fuser assembly (220-240 V)
RM1-2087-000CN
50,000 pages
Can affect print quality and
paper movement
HP LJ 1018 printer 110 V
CB419-60056 (replacement)
CB419-69056 (exchange
engine with formatter)
CB419-67001 (exchange
engine without formatter)
50,000 pages
Maximum life
HP LJ 1018 printer 220 V CB419-60055 (replacement)
CB419-69055 (exchange
engine with formatter)
CB419-67002 (exchange
engine without formatter)
50,000 pages Maximum life
24 Chapter 3 Maintenance ENWW
Cleaning the product
WARNING!Before you perform these steps, unplug the printer to avoid shock hazard.
To maintain quality, thoroughly clean the printer at the following times:
● Any time a new print cartridge is installed
●
After printing approximately 2,000 pages
●
Whenever print-quality problems appear
Clean the outside of the printer with a water-dampened cloth. Clean the inside with only a dry, lint-
free cloth (such as a lens tissue).
WARNING!Avoid touching the heating element in the fuser. It might be very hot and can
cause burns.
CAUTION To avoid permanent damage to the printer, do not use ammonia-based or ethyl
alcohol-based cleaners on or around the printer.
CAUTION Do not touch the surface of the black-sponge transfer roller. Contaminants on the
roller can cause print-quality problems.
ENWW Cleaning the product 25
Cleaning the print path
The HP LaserJet 1018 printer features a special cleaning mode to clean the paper path.
NOTE This process requires using a transparency to remove dust and toner from the print
paper path. Do not use bond or rough paper.
Make sure that the transparency that is used in this cleaning process meets the media
requirements for the printer.
If transparency film is unavailable, use copier-grade paper (70 to 90 g/m
2
, or 18 to 24 lb) that
has a smooth surface. If you must use paper, perform the procedure two or three times to
ensure thorough cleaning.
1.Make sure that the printer is idle and the Ready light is on.
2.Load the media in the input tray.
3.Open the Printer Properties dialog box.
4.Click the Configure tab, and then select Start in the Cleaning Page box.
5.Follow the instructions in the Cleaning Utility dialog box.
NOTE The cleaning process takes approximately 3 minutes. The cleaning page stops
periodically during the cleaning process. Do not turn the printer off until the cleaning process
has been completed. You might need to repeat the cleaning process several times to
thoroughly clean the printer.
Cleaning the print-cartridge area
You do not need to clean the print-cartridge area often. However, cleaning this area can improve the
quality of printed sheets.
1.Turn off the printer, unplug and remove the power cord. Wait for the printer to cool.
26 Chapter 3 Maintenance ENWW
2.Open the print-cartridge door, and remove the print cartridge (HP LJ 1010 series printer shown).
CAUTION To prevent damage, do not expose the print cartridge to light. Cover the print
cartridge, if necessary. Also, do not touch the black-sponge transfer roller inside the
printer. By doing so, you can damage the printer.
3.With a dry, lint-free cloth, wipe any residue from the media-path area and the print-cartridge
cavity.
4.Replace the print cartridge, and close the print-cartridge door (HP LJ 1010 series printer shown).
ENWW Cleaning the product 27
5.Plug in the printer, and then turn it on.
28 Chapter 3 Maintenance ENWW
Cleaning the pickup roller
If you want to clean the pickup roller rather than replace it, use the following instructions.
Remove the pickup roller as described in steps 1 through 5 of Replacing
the
pickup
roller
on
page
30. With the roller outside the printer, use the following steps to complete the cleaning.
1.Dampen a lint-free cloth with water and scrub the roller.
2.Using a dry, lint-free cloth, wipe the pickup roller to remove loosened dirt.
3.Allow the pickup roller to dry completely before you reinstall it in the printer. To reinstall the
pickup roller, see steps 6 through 9 of Replacing
the
pickup
roller
on
page
30.
ENWW Cleaning the product 29
User-replaceable parts To order a new pickup roller or separation pad, go to http://www.hp.com/
go/hpparts.
Replacing the pickup roller
If the printer regularly misfeeds (no media feeds through) and cleaning the pickup roller does not fix
the problem, replace the pickup roller.
CAUTION Failure to complete all of the steps in this procedure might damage the product.
1.Turn off the printer, unplug and remove the power cord. Wait for the printer to cool.
2.Open the print-cartridge door, and remove the print cartridge (HP LJ 1010 series printer shown).
3.Locate the pickup roller (HP LJ 1010 series printer shown).
30 Chapter 3 Maintenance ENWW
4.Gently release the small, white tabs on each side of the pickup roller by pushing them away
from the roller, and then rotate the pickup roller toward the front.
CAUTION Use gentle pressure to release the small, white tabs to avoid breaking them.
5.Gently pull the pickup roller up and out.
6.Position the new pickup roller in the slot of the previous pickup roller.
NOTE Circular and rectangular pegs on each side prevent you from incorrectly
positioning the pickup roller.
7.Rotate the top of the new pickup roller into position until the white tabs on each side of the roller
snap the roller into place.
ENWW User-replaceable parts 31
8.Reinstall the print cartridge, and close the print-cartridge door.
9.Plug in the printer, and then turn it on.
32 Chapter 3 Maintenance ENWW
Replacing the separation pad
If the printer regularly pulls multiple sheets of media at a time, you might need to change the
separation pad. Recurring feed problems might indicate that the separation pad is worn.
Normal use with good-quality media causes wear. The use of poor-quality media might require more
frequent replacement of the separation pad.
NOTE Before you change the separation pad, clean the pickup roller. See Cleaning
the
pickup
roller
on
page
29. To order parts, go to http://www.hp.com/
go/hpparts.
1.Turn off the printer, unplug and remove the power cord. Wait for the printer to cool.
2.At the back of the printer, use a #2 Phillips screwdriver to unscrew the two screws that hold the
separation pad in place.
3.Remove the separation pad.
ENWW User-replaceable parts 33
4.Insert the new separation pad, and screw it in place.
5.Plug the printer in, and then turn it on.
34 Chapter 3 Maintenance ENWW
Replacing the main input tray (paper-pickup tray assembly)
If you break or damage the main input tray (also called the paper-pickup tray assembly), you can
replace it. To order parts, go to http://www.hp.com/
go/hpparts.
1.Carefully flex the main input tray just enough to release one side.
NOTE Be careful not to break the hinge points.
3
2
1
Figure 3-1 Main input tray (HP LaserJet 1020 printer shown)
2.Remove the main input tray.
ENWW User-replaceable parts 35
Replacing the output-bin extension (delivery-tray assembly)
If you break or damage the output-bin extension (also called the delivery-tray assembly), you can
replace it. To order parts, go to http://www.hp.com/
go/hpparts.
1.Carefully flex the sides of output-bin extension just enough to release the hinge pins.
NOTE Be careful not to break the hinge pins (callout 1).
1
Figure 3-2 Output-bin extension
2.Remove the output-bin extension.
36 Chapter 3 Maintenance ENWW
4 Operational overview
This chapter describes the general components and theory of operation of the HP LaserJet 1018
printer.
●
Basic
functions
●
Formatter
system
●
Printer
functions
ENWW 37
Basic functions
The following are the major systems of the printer: ●
Formatter and I/O functions
●
Formatter system
●
Printer functions and operation
● Engine-control system (engine control unit [ECU] and engine power assembly)
● Image-formation system
● Paper-feed system
PRINTER
FORMATTER
ENGINE UNIT
ECU
COMPUTER
Figure 4-1 Basic configuration
38 Chapter 4 Operational overview ENWW
Formatter system
The formatter coordinates the major systems. It is responsible for the following tasks:
●
Receiving and processing print data from the printer interface (the computer)
● Monitoring the control panel and relaying printer-status information
● Coordinating image formation and timing with the print engine
● Communicating with the host computer through the bidirectional interface
The formatter receives print data from the universal serial bus (USB) interface and converts it into a
dot image. The ECU synchronizes the image-formation system with the paper-feed system and
signals the formatter to send the print-image data to the laser system. The formatter sends the print-
image data (dots) in the form of a video signal, and the printing process begins. Central processing unit The formatter uses an embedded Coldfire V4 microprocessor operating at 133 MHz.
RAM
●
One bank of nonvolatile RAM (NVRAM) stores parameters.
●
Dynamic random access memory (DRAM) provides temporary storage of the product program
code and print data.
●
The HP LaserJet 1018 printer has 2 MB of RAM.
USB interface
The formatter receives incoming data through the USB interface. This interface provides high-speed,
two-way communication between the printer and the host, allowing applications on the host computer
to change printer settings and monitor printer status. The USB interface is compatible with the USB
2.0 specification.
Control panel
The control panel consists of two status lights.
Draft mode (EconoMode)
Depending on which driver is used, selecting draft or EconoMode from the driver allows the product
to use less toner, extending the life of the print cartridge. There is a change in print quality when this
setting is used.
NOTE HP does not recommend the full-time use of EconoMode. If EconoMode is used full-
time when the average toner coverage is very low, it is possible that the toner supply will
outlast the mechanical parts of the print cartridge.
HP Memory Enhancement technology (MEt)
HP MEt effectively doubles the standard memory through a variety of font- and data-compression
methods.
ENWW Formatter system 39
Enhanced I/O The Enhanced I/O feature uses printer memory to store data that the printer receives from the host
computer. When Enhanced I/O is enabled, you can send more data to the printer in less time, so that
you can return to your software program sooner. Enhanced I/O has the following options:
● Auto: The product uses Enhanced I/O memory allocation to increase the speed of data transfer
from the host computer to the printer, if necessary. The default setting is Auto.
● Off: The printer uses the minimum amount of product memory for storing data that the host
computer sends.
● Page protect: The formatter creates the entire page image in page-buffer memory before
physically moving the media through the printer. This process ensures that the entire page is
printed.
Page complexity (ruling lines, complex graphics, or dense text) can exceed the printer’s ability to
create the page image quickly enough to keep pace with the image-formation process. If the page-
protect feature is disabled and a page is too complex, the page might print in parts (for example, the
top half on one page and the bottom half on the next page). Some print-data loss is likely in these
instances, and the Attention light on the control panel will illuminate.
40 Chapter 4 Operational overview ENWW
Printer functions
Printer functions are divided into five groups:
● Engine control
● Formatter
●
Image formation
●
Laser/scanner
● Pickup and feed
The following figure is a block diagram of the printer:
Figure 4-2 Printer functional-block diagram
ENWW Printer functions 41
Engine control system (engine control unit and power assembly)
The engine control system coordinates all print engine activities. The engine control system includes
both the engine control unit (ECU) PCA and the engine-power-assembly PCA.
NOTE In other HP LaserJet products, the ECU and power functions are combined onto one
PCA known as the controller PCA or the DC controller PCA. In the HP LaserJet 1018 printer,
the control functions are primarily relegated to the ECU PCA, and the power functions are
relegated to the engine-power-assembly PCA.
The ECU controls the following systems and functions:
●
Printer-engine control
●
Paper-motion monitoring and control (printing)
● Motor
●
Printer laser/scanner unit
The engine-power assembly provides the following features in the power system:
●
AC power distribution
● DC power distribution
● Overcurrent/overvoltage protection
● High-voltage power distribution
Printer-engine-control system
Paper motion monitoring and control
The ECU controls paper motion in the printer by continuously monitoring the two paper sensors and
coordinating the timing with the other print processes.
For a detailed explanation of paper movement and the interaction of the sensors and pickup solenoid
with the paper-movement process, see Printer
paper-feed
system
on
page
47.
Motor
The ECU controls the motor. The motor drives all of the paper movement in the printer.
42 Chapter 4 Operational overview ENWW
Printer laser/scanner unit The ECU sends signals to the laser/scanner assembly to modulate the laser diode on and off modes
and to drive the laser/scanner motor.
VDO?
/VDO?
CNT0?
CNT1?
/BDI?
/BD?
/ACC?
/DEC?
Formatter?
Laser driver PCB?
Focusing lens?
Scanner motor?
Four-sided?
mirror?
Cylindrical lens?
BD?
sensor?
Engine?
controller?
PCB?
Photosensitive
?
drum?
Figure 4-3 Laser/scanner operation
ENWW Printer functions 43
Power system on the engine power assembly
The engine-power assembly provides the ac, dc, and high-voltage power supply circuits.
AC power distribution
The ac power circuitry supplies ac voltage whenever the power cord is connected to the ac power
source and the power switch is on. AC voltage is distributed to the dc power supply circuitry and to
the ac driver circuitry, which controls ac voltage to the fuser-assembly heating element. DC power distribution
The dc power distribution circuitry, located on the engine-power assembly, distributes +3.3 Vdc,
+5 Vdc, and +24 Vdc as follows:
●
+3.3 Vdc
ECU, sensors, formatter
● +5 Vdc
Parallel interface on the HP LJ 1015 printer formatter
● +24 Vdc Main motor, laser/scanner motor, solenoid, high-voltage power supply, fuser, safety
circuit, door switch
CAUTION
Overcurrent/overvoltage
Two overvoltage devices are in this printer:
● Fuse F101 provides overcurrent protection for the fusing-system circuitry.
● Fuse F102 (110 V printers only) provides overcurrent protection to the printer dc power-supply
circuitry.
You can check or replace the fuses by removing the left cover. If either of these fuses fails, replace
the engine-power assembly.
High-voltage power distribution
The high-voltage power supply applies an overlap of dc and ac voltage to the primary-charging roller
and to the developing roller. This circuit also applies a positive or negative dc voltage to the transfer
roller according to the instructions from the engine-control unit.
This circuit also controls the image density by changing the primary ac voltage and the developing ac
bias according to the print-density setting. See Setting
media
types
on
page
22.
The high-voltage power supply is disabled when the print-cartridge door is open.
44 Chapter 4 Operational overview ENWW
PR1?
TRS?
DEV?
IC902?
CPU?
DV?AC?
TRNDC?
TRCRNT?
TRPDC?
PRAC?
PRPWM?
IC301?
IC301?IC301?
IC301?
IC501?
Positive voltage?
generation circuit?
J303?
J304?
J301?
J302?
DC voltage?
generation?
circuit?
AC voltage?
generation?
circuit?
DC voltage?
generation?
circuit?
AC voltage?
generation?
circuit?
Combined?
Combined?
Primary?
charging roller?
Developing?
cylinder?
T?ransfer?
chargin?g ?
roller?
Engine controller PCB?
High-voltage power supply circuit?
Developing bias circuit?
T?ransfer charging bias circuit?
Negative voltage?
generation circuit?
Photosensitive?
drum?
Primary charging bias circuit?
J201-14?
J902-10?
J201-15?J902-9?
J201-16?J902-8?
J201-18?J902-6?
J201-17?J902-7?
J201-22?J902-2?
Power supply PCB?
Figure 4-4 High-voltage power supply circuit
Image-formation system
Laser printing requires the interaction of several different technologies, including electronics, optics,
and electrophotographic, to provide a printed page. Each process functions independently and must
be coordinated with the other printer processes. Image formation consists of seven processes, which
are described in the following section.
ENWW Printer functions 45
The seven image-formation processes Paper Pickup
Figure 4-5 Image formation-block diagram
1.Conditioning stage (primary charging)—This process applies a uniform negative charge to
the surface of the drum with the primary charging roller, which is located in the print cartridge.
The primary charging roller is coated with conductive rubber. An ac bias is applied to the roller
to erase any residual charges from any previous image. In addition, the primary charging roller
applies a negative dc bias to create a uniform negative potential on the drum surface. The print
density setting modifies the dc voltage.
2.Writing stage (scanning exposure)—During this process, a modulated laser diode projects
the beam onto a rotating scanning mirror. As the mirror rotates, the beam reflects off the mirror,
first through a set of focusing lenses, then off a mirror, and finally through a slot in the top of the
print cartridge, and onto the photosensitive drum. The beam sweeps the drum from left to right,
discharging the negative potential wherever the beam strikes the surface. This creates a latent
electrostatic image, which later is developed into a visible image. Because the beam sweeps
the entire length of the drum while the drum rotates, the entire surface area of the drum can be
covered. At the end of each sweep, the beam strikes the beam-detect lens, generating the
beam-detect signal (BD signal). The BD signal is sent to the ECU where it is converted to an
electrical signal used to synchronize the output of the next scan line of data. 3.Developing stage—During this process, the latent electrostatic image is present on the drum.
The toner particles obtain a negative surface charge by rubbing against the developing cylinder,
which is connected to a negative dc supply. The negatively charged toner is attracted to the
discharged (exposed, grounded) areas of the drum, and it is repelled from the negatively
charged (unexposed) areas. 4.Transfer stage—During this process, the toner image on the drum surface is transferred to the
media. The transfer roller applies a positive charge to the back of the media, which attracts the
negatively charged toner on the drum surface to the media. After separation, the drum is
cleaned and conditioned for the next image.
5.Separation stage—During this process, the media separates from the drum. To stabilize the
feed system and prevent toner dropouts on the printed image at low temperature and humidity,
the static eliminator reduces the charge on the back of the media.
46 Chapter 4 Operational overview ENWW
6.Fusing stage—During this process, the heat and pressure fuse the toner into the media to
produce a permanent image. The media passes between a heated fusing element and a soft
pressure roller, which melt the toner and press it into the media.
7.Drum-cleaning stage—During this process, the cleaning blade is in contact with the surface of
the drum at all times. As the drum rotates during printing, the cleaning blade wipes excess toner
off the drum and stores it in the waste toner receptacle.
Print cartridge
As the focal point of the image-formation system, the print cartridge contains toner and houses the
cleaning, conditioning, and developing stages of the process. The print cartridge contains the
photosensitive drum, primary-charging roller, developing station, toner cavity, and cleaning station.
By including these components (which wear, degrade, or are consumed) in the replaceable print
cartridge, the need for many service calls is eliminated. The special photosensitive properties of the
drum form an image on the drum surface and then transfer the image to media.
CAUTION The print cartridge does not include a light-blocking shutter. Do not expose the
drum to light, which can permanently damage the drum. Protect the print cartridge whenever
you remove it by covering it with paper.
Printer paper-feed system
The main input tray and the priority feed slot merge into one main input area. The printer senses the
media as it enters the paper-feed path and passes the top-of-page sensor (PS801). It does not
sense the presence of media before the beginning of the print cycle. The following steps occur when
the printer receives a print job.
Step 1
The ECU activates the motor (M1). Paper motion begins when the ECU energizes the pickup
solenoid (SL1).
Step 2
The paper pickup roller rotates once. The paper-lift plate pushes the media against the pickup
roller.
Step 3
Using friction, the pickup roller grabs the top sheet and advances it to the feed-assembly drive-
rollers. To ensure that only one sheet is fed, a main separation pad holds the remainder of the
stack in place.
Step 4
The feed-assembly drive-rollers advance the media to the top-of-page sensor (PS801). This
sensor informs the ECU of the exact location of the leading edge of media, so that the image
being written on the photosensitive drum can be precisely positioned on the page.
Step 5
The feed-assembly drive-rollers then advance the media to the transfer area where the toner
image on the photosensitive drum is transferred to the media.
Step 6
After the image is transferred, the media enters the fuser assembly where heat from the fuser
and pressure from the pressure roller permanently bond the toner image to media. The paper-
delivery sensor (PS803) determines that the media has successfully moved out of the fusing area.
Step 7
The fuser-assembly exit-rollers deliver media to the output bin face-down.
ENWW Printer functions 47
Face-down delivery
roller
Pick-up roller
Transfer
charging
roller
Manual feed tray
Pickup tray
Fuser pressure
roller
Fuser filmunit
PS801
PS802
PS803
PS804
Photosensitive
drum
Formatter
Engine controller PCB
SL1
PICKU
PSOLENOIDDRIVEsignal(CPUD)
PAPERDELIVERYDETECTIONsignal
(/POSNS)
FUSERDELIVERYPAPERWIDTH
DETECTIONsigunal(/PW2SNS)
TO
P-
OF-PAGE-DETECTIONsignal(/PISNS)
MAINMOTORDRIVEsignals
Separation
pad
BDOUTPUTsignal(/BD)
PAPERWIDTHDETECTIONsignal(/PWSNS)
PS801:Top-of-page sensor
PS802:Paper width sensor
PS803:Paper delivery sensor
PS804:Fuser delivery paper width sensor
M1:Main motor
SL1:Pickup solenoid
-
-
M1
Figure 4-6 Printer paper path 48 Chapter 4 Operational overview ENWW
Jam detection The top-of-page sensor (PS801) and the paper-delivery sensor (PS803) detect media moving
through the printer. If a jam is detected, the ECU immediately stops the printing process and the jam
light on the control panel illuminates.
Conditions of jam detection
● Pickup-delay jam—Paper does not reach the top-of-page sensor (PS801) within 1.4 seconds
after the pickup solenoid (SL1) has been turned on, a second pickup operation is attempted,
and paper again does not reach the top-of-page sensor within 1.4 seconds.
● Pickup stationary jam—The top-of-page sensor (PS801) does not detect the trailing edge of
media within 4.6 seconds of detecting the leading edge.
●
Delivery-delay jam—The paper-delivery sensor (PS803) does not detect the leading edge of
media within 2.1 seconds after the top-of-page sensor (PS801) detects the leading edge.
● Wrapping jam—The paper-delivery sensor (PS803) does not detect the trailing edge of the
media within 1.5 seconds after the top-of-page sensor (PS801) detects the leading edge and
within ten seconds after the paper-delivery sensor (PS803) detects the leading edge.
● Delivery-stationary jam—The paper delivery sensor (PS803) does not detect the leading edge
of media within 2.2 seconds after the top-of-page sensor (PS801) detects the trailing edge.
●
Residual media jam—The top-of-page sensor (PS801) or the paper-delivery sensor (PS803)
detects media during the initial rotation period.
● Door-open jam—The top-of-page sensor (PS801) or the paper-delivery sensor (PS803)
detects media while the print cartridge door is open.
ENWW Printer functions 49
Solenoid, sensors, switches, and motor
The following figure shows the locations of the solenoid, sensors, switches, and motor.
Figure 4-7 Solenoid, sensors, switches, and motor
1
The door switch detects whether the print-cartridge door is closed. Printing cannot continue until the print-cartridge
door is closed.
2
Power switch
3
The paper-width sensor senses the width of the paper.
4
The paper-delivery sensor senses when paper has successfully moved out of the fusing area.
5
The top-of-page sensor detects the leading and trailing edges of the paper. It synchronizes the photosensitive drum
and the top of the paper.
6
Solenoid
7
Motor
50 Chapter 4 Operational overview ENWW
Basic sequence of operation (formatter-to-printer)
The microprocessor (CPU) on the ECU controls the printer operation sequence. The following events
take place during normal printer operation.
Table 4-1 Basic sequence of operation
Period
Purpose
Remarks
WAIT: After the product is turned on
until the end of the initial rotation of the
main motor.
To clear the drum surface of potential
and to clean the primary charging roller.
Detects whether or not the cartridge is
installed.
STBY (Standby): From the end of the
WAIT period or the LSTR period until
the pickup command is sent from the
formatter. Or, from the end of the LSTR
period until the product is turned off.
To pause until the product is ready to
print.
INTR (Initial Rotation): After the pickup
command has been sent from the
formatter until the media reaches the
top-of-page sensor (PS801).
To stabilize the photosensitive drum
sensitivity in preparation for printing,
and to clean the primary charging roller.
PRINT (Print): From the end of the
initial rotation until the primary voltage
goes OFF. To form images on the photosensitive
drum based on the VIDEO signals (/
VDO, VDO) sent from the formatter
and to transfer the toner image onto
the media.
LSTR (Last Rotation Period): After the
primary voltage goes OFF until the
main motor stops rotating.
To deliver the last page, and to clean
the primary charging roller.
When the pickup command is sent
from the video controller, the printer
enters the INTR period immediately
after the end of the LSTR period.
ENWW Printer functions 51
1?
2?
3?
4?
5?
6?
7?
8?
9?
10?
1?1?
12?
13?
14?
15?
16?
17?
18?
19?
20?
STBY?
W?AIT?
STBY?
Fixing Heater (H701)?
Print Command?
Scanner Motor?
Scanner Ready?
Main Motor (M1)?
Pick-up Solenoid (SL1)?
T?op of Paper Sensor (PS801)?
Paper Delivery Sensor (PS803)?
Primary Charging Bias (AC)?
Primary Charging Bias (DC)?
Developing Bias (AC)?
Developing Bias (DC)?
T?ransfer Charging Bias?
Laser Diode?
LASER BEAM signal (BD)?
INTR?
PRINT?
LSTR?
About 1.1?
About 1.1?
About 1.1?
About 0.5?
About 0.47?
About 0.16?About 0.17?
About 0.16?
About 0.17?
About 0.4?
About 0.4?
About 2.2?
About 0.08?
About 0.02?
About 0.02?
About 1.5?
About 0.7?
About 0.7?
About 1.5?
About 3.0?
About 0.1?
About 0.25?
About 0.45?
Abou?t ?
0.65?
About 0.6?
About 0.2?
About 0.2?
About 1.5?
About 0.1?
About 0.99?
Max. 122?
About 0.08?
About 0.47?
Max. 1.5?
1.8?
Max. 1.5?
About 0.2?
1.7?
1.0?
0.04?
0.2?
0.2?
Max. 3.0?
Power Switch ON?
SEQUENCE?
100?C Control?
Print ?T?emperature Control?
Between-sheets ?T?emperature Control?
Negative Bias?
Between-sheets Bias?
Print Bias?
Forced emission?
(Unit:Seconds)?
Figure 4-8 Printer timing diagram
NOTE The timing chart is for one sheet of A4-size media.
52 Chapter 4 Operational overview ENWW
5 Removal and replacement
This chapter describes the removal and replacement of field-replaceable units (FRUs) only.
●
Removal
and
replacement
strategy
●
User-replaceable
parts
●
Covers
●
Internal
assemblies
ENWW 53
Removal and replacement strategy
This chapter contains detailed steps and images that show parts removal. Replacement is generally
the reverse of removal. Occasionally, notes are included to provide directions for difficult or critical
replacement procedures. WARNING!Remove the power cord before attempting to service the product. If this warning
is not followed, severe injury can result, as well as damage to the device. Certain functional
checks during troubleshooting must be performed with power supplied to the product.
However, the power supply should be disconnected during removal of any parts.
Sheet metal and plastic edges in the product can be sharp. Use caution when working on the
product.
Never operate or service the printer with the protective cover removed from the laser/scanner
assembly. The reflected beam, although invisible, can damage your eyes.
CAUTION Some parts are sensitive to electrostatic discharge (ESD). Always perform
service work at an ESD-protected workstation. If an ESD-protected workstation is not
available, ground yourself by touching the sheet-metal chassis before touching an ESD-
sensitive part.
NOTE To install a self-tapping screw, first turn it counterclockwise to align it with the existing
thread pattern, and then carefully turn it clockwise to tighten. Do not overtighten. If a self-
tapping screw-hole becomes stripped, repair the screw-hole or replace the affected assembly.
Required tools ●#2 Phillips screwdriver with magnetic tip
●
Small flat-blade screwdriver
●
Needle-nose pliers
● ESD mat
CAUTION Do not use a pozidrive screwdriver or any motorized screwdriver. These can
damage screws or screw threads on the product.
CAUTION Do not pull directly on the wires when a connector is disconnected. Always pull
on the plastic body of a connector to avoid damaging the connector wires.
Before performing service
● Remove all media.
● Unplug the power cable.
●
Place the product on an ESD mat (if one is available).
●
Remove the input-tray cover.
● Remove the print cartridge.
54 Chapter 5 Removal and replacement ENWW
Print cartridge 1.Open the print-cartridge door on the top of the printer.
2.Remove the print cartridge.
CAUTION To prevent damage, do not expose the print cartridge to light. Cover it with a
piece of paper.
Figure 5-1 Removing the print cartridge
ENWW Removal and replacement strategy 55
Parts removal order Use the following illustration to determine which parts must be removed before removing other parts.
Right-side cover
Transfer-roller
assembly
Front-cover
assembly
Rear-panel
assembly
START
Engine-power
assembly
Fuser (fixing)
assembly
Left-side cover
Paper-pickup
assembly
User-replaceable parts:
Output bin
Main input tray
Pickup roller
ECU assembly
Laser/scanner
assembly
Figure 5-2 Parts-removal block diagram
56 Chapter 5 Removal and replacement ENWW
User-replaceable parts To order a new pickup roller or separation pad, go to http://www.hp.com/
go/hpparts.
Replacing the pickup roller If the printer regularly misfeeds (no media feeds through) and cleaning the pickup roller does not fix
the problem, replace the pickup roller.
CAUTION Failure to complete all of the steps in this procedure might damage the product.
1.Turn off the printer, unplug and remove the power cord. Wait for the printer to cool.
2.Open the print-cartridge door, and remove the print cartridge (HP LJ 1010 series printer shown).
3.Locate the pickup roller (HP LJ 1010 series printer shown).
ENWW User-replaceable parts 57
4.Gently release the small, white tabs on each side of the pickup roller by pushing them away
from the roller, and then rotate the pickup roller toward the front.
CAUTION Use gentle pressure to release the small, white tabs to avoid breaking them.
5.Gently pull the pickup roller up and out.
6.Position the new pickup roller in the slot of the previous pickup roller.
NOTE Circular and rectangular pegs on each side prevent you from incorrectly
positioning the pickup roller.
7.Rotate the top of the new pickup roller into position until the white tabs on each side of the roller
snap the roller into place.
58 Chapter 5 Removal and replacement ENWW
8.Reinstall the print cartridge, and close the print-cartridge door.
9.Plug in the printer, and then turn it on.
ENWW User-replaceable parts 59
Replacing the separation pad
If the printer regularly pulls multiple sheets of media at a time, you might need to change the
separation pad. Recurring feed problems might indicate that the separation pad is worn.
Normal use with good-quality media causes wear. The use of poor media might require more
frequent replacement of the separation pad.
NOTE Before you change the separation pad, clean the pickup roller. See Cleaning
the
pickup
roller
on
page
29. To order parts, go to http://www.hp.com/
go/hpparts.
1.Turn off the printer, unplug and remove the power cord. Wait for the printer to cool.
2.At the back of the printer, use a #2 Phillips screwdriver to unscrew the two screws that hold the
separation pad in place.
3.Remove the separation pad.
60 Chapter 5 Removal and replacement ENWW
4.Insert the new separation pad, and screw it in place.
5.Plug the printer in, and then turn it on.
ENWW User-replaceable parts 61
Replacing the main input tray (paper-pickup tray assembly)
If you break or damage the main input tray (also called the paper-pickup tray assembly), you can
replace it. To order parts, go to http://www.hp.com/
go/hpparts.
1.Carefully flex the main input tray just enough to release one side.
NOTE Be careful not to break the hinge points.
3
2
1
Figure 5-3 Main input tray (HP LaserJet 1020 printer shown)
2.Remove the main input tray.
62 Chapter 5 Removal and replacement ENWW
Replacing the output-bin extension (delivery-tray assembly)
If you break or damage the output-bin extension (also called the delivery-tray assembly), you can
replace it. To order parts, go to http://www.hp.com/
go/hpparts.
1.Carefully flex the output-bin extension just enough to release the hinge pins.
NOTE Be careful not to break the hinge pins (callout 1).
1
Figure 5-4 Output-bin extension
2.Remove the output-bin extension.
ENWW User-replaceable parts 63
Covers
Remove the covers to gain access to the internal replaceable parts.
Right-side cover
1.Before removing the cover, examine Figure
5
-
5
Remove
the
right-side
cover
(1
of
4;
HP LJ
1020
printer
shown)
on
page
64 and note the location of tabs on the cover.
Figure 5-5 Remove the right-side cover (1 of 4; HP LJ 1020 printer shown)
2.Remove one screw (callout 1) and then release one tab (callout 2).
1
2
Figure 5-6 Remove the right-side cover (2 of 4; HP LJ 1020 printer shown)
64 Chapter 5 Removal and replacement ENWW
3.Open the print-cartridge door. Grasp the cover, and carefully pry up on the cover to release one
tab.
Figure 5-7 Remove the right-side cover (3 of 4; HP LJ 1020 printer shown)
4.Slightly rotate the back of the cover away from the product, and then slide the cover forward to
remove it.
NOTE If the cover cannot be removed easily, release one additional tab that is located
on the bottom of the printer near the center of the cover.
1
2
Figure 5-8 Remove the right-side cover (4 of 4; HP LJ 1020 printer shown)
ENWW Covers 65
Left-side cover
?Removing the left-side cover is similar to removing the right-side cover. Use the steps and
figures for removing the right-side cover, except start the procedure by examining the tabs on
the left side and removing the screw on the left side.
NOTE If the cover cannot be removed easily, release one additional tab that is located
on the bottom of the printer near the center of the cover.
Rear panel and top-cover assembly
NOTE This procedure removes the rear panel and the top-cover assembly (the assembly
consists of the print-cartridge door and the fuser cover).
1.Remove the following assemblies.
● Right-side cover. See Right-side
cover
on
page
64.
●
Left-side cover. See Left-side
cover
on
page
66.
2.Open the print-cartridge door.
3.Remove two screws from the top of the printer (callout 1).
1
Figure 5-9 Remove the rear panel and top-cover assembly (1 of 6)
66 Chapter 5 Removal and replacement ENWW
4.Squeeze the two retaining tabs on the plastic door-link clip to release it from the hinge arm on
the print-cartridge door.
CAUTION Do not drop the clip into the gear assembly that is on the side of the printer.
Figure 5-10 Remove the rear panel and top-cover assembly (2 of 6)
Hint Reinsert the plastic door-link clip in the hinge arm or store it with the screws to
prevent losing it.
Figure 5-11 Remove the rear panel and top-cover assembly (3 of 6)
ENWW Covers 67
5.Remove one screw (callout 2) from the back of the product.
2
Figure 5-12 Remove the rear panel and top-cover assembly (4 of 6; HP LJ 1020 printer shown)
6.The top-cover assembly and metal rear-panel are interlocked with plastic tabs. Plastic tabs also
secure the metal rear-panel at the bottom. Lift up the fuser cover at the top and pull it back
slightly. Lift the rear panel up and off the tabs on the bottom.
Figure 5-13 Remove the rear panel and top-cover assembly (5 of 6)
68 Chapter 5 Removal and replacement ENWW
7.Lift up on the top-cover assembly to remove it.
Figure 5-14 Remove the rear panel and top-cover assembly (6 of 6)
Reinstalling the top-cover assembly
1.To reinstall the top-cover assembly, raise the two pressure-release levers.
Figure 5-15 Reinstall the top-cover assembly (1 of 2)
ENWW Covers 69
2.Position the top-cover assembly over the pressure-release levers (callout 1), and lower it onto
the chassis. Make sure that the pressure-release levers are inserted through the slots (callout 2)
on the top-cover assembly.
1
2
Figure 5-16 Reinstall the top-cover assembly (2 of 2)
CAUTION Make sure that the two plastic antistatic tabs are correctly positioned. The
tabs must protrude into the output bin area.
70 Chapter 5 Removal and replacement ENWW
Front cover
1.Remove the following assemblies.
● Right-side cover. See Right-side
cover
on
page
64.
●
Left-side cover. See Left-side
cover
on
page
66.
2.Before removing the cover, examine Figure
5
-
17
Remove
the
front
cover
(1
of
3)
on
page
71
and note the locations of the plastic tabs at the top of the front cover. Open the print-cartridge
door.
Figure 5-17 Remove the front cover (1 of 3)
ENWW Covers 71
3.Release the tab on the bottom right side of the front cover, and then pull the bottom of cover
away from the chassis. Repeat this step for the left side of the front cover.
1
2
Figure 5-18 Remove the front cover (2 of 3)
4.With the bottom of the front cover released, pull up and back at the top of the cover while gently
rocking it to release all of the tabs at the top, and remove the front cover.
Figure 5-19 Remove the front cover (3 of 3)
Reinstallation tip When reinstalling the front cover, make sure that the tabs on the top
of the cover are securely in place, and then press the bottom of the front cover into place.
72 Chapter 5 Removal and replacement ENWW
Internal assemblies
When replacing internal assemblies, make sure to transfer any component parts that are not
provided with the new assembly from the failed assembly to the new assembly. For example, sensor
PCBs are not included with the fuser assembly or the paper-pickup assembly. The sensor PCB from
the failed assembly must be transferred to the new assembly.
Transfer-roller assembly
Before proceeding, make sure it is absolutely necessary to remove the transfer roller.
CAUTION Be very careful not to break the paper guide that is removed during replacement
of the transfer roller. This is not a service part. If the paper guide is broken, the entire printer
must be replaced.
CAUTION Do not touch the black-sponge portion of the transfer roller. Skin oils and finger
prints can cause print-quality problems.
1.Open the print-cartridge door, and then release the two tabs on the paper guide and rotate it up.
Figure 5-20 Remove the transfer roller (1 of 3)
ENWW Internal assemblies 73
2.The clamps on the paper guide fit over the bearings on the right and left ends of the transfer
roller. Do not touch the black-sponge portion of the transfer roller. Grasp the right end of the
paper guide and pull the clamp off the right bearing. Slide the paper guide slightly to the right,
and the left clamp will slide off the left bearing.
Figure 5-21 Remove the transfer roller (2 of 3)
3.Use needle-nose pliers or your fingers to squeeze the two small tabs on the transfer roller.
Figure 5-22 Remove the transfer roller (3 of 3)
4.Angle the transfer roller up while holding on to the gear on the right side. Slide the roller toward
right side of the printer, and lift both the transfer roller and the transfer-roller guide out of the
printer.
74 Chapter 5 Removal and replacement ENWW
Reinstallation tip A small grounding spring is under the right transfer-roller bearing.
When reinstalling the transfer roller, position this spring correctly under the right bearing.
Reverse the removal process to install the new transfer roller. Then reinstall the paper
guide by gently pressing the two ends of the guide onto the transfer-roller bearings until
the clamps snap into place. Rotate the paper guide down until the tabs on both ends
engage.
Engine-power assembly
1.Remove the following assemblies
●
Right-side cover. See Right-side
cover
on
page
64.
● Left-side cover. See Left-side
cover
on
page
66.
● Top-cover assembly. See Rear
panel
and
top-cover
assembly
on
page
66.
● Front cover. See Front
cover
on
page
71.
2.Disconnect six cables (callout 1) near the top of the power assembly.
CAUTION Do not pull directly on the wires when a connector is disconnected. Always
pull on the plastic body of a connector to avoid damaging the connector wires.
3.Remove four screws (callout 2).
1
2
Figure 5-23 Remove the engine-power assembly (1 of 2; HP LJ 1020 printer shown)
ENWW Internal assemblies 75
4.Remove two screws from the back of the printer (callout 3), disconnect the high-voltage wire
(callout 4) and then remove the engine-power assembly.
NOTE Be careful not to lose the two springs that are behind the engine-power assembly.
3
4
Figure 5-24 Remove the engine power assembly (2 of 2)
Reinstallation tip When reinstalling the engine-power assembly, make sure that the
cable guide is correctly installed by clipping it onto the PCB at the top, back corner and
onto the metal casing.
76 Chapter 5 Removal and replacement ENWW
Fuser (fixing) assembly
1.Remove the following assemblies.
● Right-side cover. See Right-side
cover
on
page
64.
●
Left-side cover. See Left-side
cover
on
page
66.
●
Top-cover assembly. See Rear
panel
and
top-cover
assembly
on
page
66.
2.Disconnect cables, as necessary, from near the top of the engine-power assembly, and
disconnect the high-voltage wire (callout 1) from the back of the printer.
CAUTION Do not pull directly on the wires when a connector is disconnected. Always
pull on the plastic body of a connector to avoid damaging the connector wires.
1
Figure 5-25 Remove the fuser (fixing) assembly (1 of 2)
3.Remove the wire harnesses from the plastic harness retainers.
ENWW Internal assemblies 77
4.Remove three screws (callout 2). (This figure shows the delivery-sensor PCB removed, but it is
not necessary to remove this PCB in order to remove the fuser).
2
Figure 5-26 Remove the fuser (fixing) assembly (2 of 2)
5.Lift the end of the fuser assembly from the right side of the printer, and remove it.
Reinstallation tip When replacing the fuser assembly, be sure to transfer the delivery
sensor PCB from the old fuser to the new one.
NOTE When reinstalling the fuser assembly, be careful not to break the plastic tab on the
assembly.
78 Chapter 5 Removal and replacement ENWW
Paper-pickup assembly
1.Remove the following assemblies.
● Right-side cover. See Right-side
cover
on
page
64.
●
Left-side cover. See Left-side
cover
on
page
66.
●
Top-cover assembly. See Rear
panel
and
top-cover
assembly
on
page
66.
● Transfer roller. See Transfer-roller
assembly
on
page
73.
● Fuser (fixing) assembly. See Fuser
(fixing)
assembly
on
page
77.
2.Disconnect and unwind any additional wires as necessary to release the paper-pickup
assembly. Unplug and unwind the wire from the solenoid to the formatter.
Disconnect and unwind any additional wires as necessary to release the paper-pickup
assembly. Unplug and unwind the wire from the solenoid to the formatter.
CAUTION Do not pull directly on the wires when a connector is disconnected. Always
pull on the plastic body of a connector to avoid damaging the connector wires.
3.Remove six screws (callout 1), and then remove the paper-pickup assembly.
1
Figure 5-27 Remove the paper-pickup assembly
Reinstallation tip When replacing the paper-pickup assembly, be sure to transfer the
sensor PCB and, if necessary, the separation-pad assembly to the new paper-pickup
assembly.
ENWW Internal assemblies 79
Engine control unit (ECU) assembly
1.Remove the following assemblies.
● Right-side cover. See Right-side
cover
on
page
64.
●
Left-side cover. See Left-side
cover
on
page
66.
●
Top-cover assembly. See Rear
panel
and
top-cover
assembly
on
page
66.
● Front cover. See Front
cover
on
page
71.
2.Disconnect the flat flexible (ribbon) cable (callout 1) from the formatter, which is on the right side
of the product.
Figure 5-28 Remove the ECU assembly (1 of 6)
80 Chapter 5 Removal and replacement ENWW
3.Disconnect the flat flexible (ribbon) cable (callout 2) from the engine-power assembly.
Figure 5-29 Remove the ECU assembly (2 of 6)
4.Remove four screws (callout 3).
3
Figure 5-30 Remove the ECU assembly (3 of 6)
5.Lift the ECU cover up just enough to free it, and then tilt it back as far as it will go without forcing
it.
ENWW Internal assemblies 81
6.Two sheet-metal hook hinges (one on each side) secure the cover. Use a screwdriver to push
both hooks free, and then remove the ECU cover.
1
2
Figure 5-31 Remove the ECU assembly (4 of 6)
7.Release the plastic wire-retainer tab (arrow 1), and rotate the retainer up and away from the
chassis (arrow 2).
2
1
Figure 5-32 Remove the ECU assembly (5 of 6)
82 Chapter 5 Removal and replacement ENWW
8.Disconnect one flat flexible (ribbon) cable and the connector to the step motor (callout 4).
Remove two screws (callout 5). Loosen the tape (callout 6) that secures the cable to the
chassis. As you remove the ECU, unplug the additional connector to the laser/scanner assembly.
CAUTION Do not pull directly on the wires when a connector is disconnected. Always
pull on the plastic body of a connector to avoid damaging the connector wires.
5
6
4
Figure 5-33 Remove the ECU assembly (6 of 6)
Reinstallation tip When reinstalling the ECU metal casing, make sure that the laser/
scanner shutter lever is inserted correctly through the plastic guide.
ENWW Internal assemblies 83
Laser/scanner assembly
1.Remove the following assemblies.
● Right-side cover. See Right-side
cover
on
page
64.
●
Left-side cover. See Left-side
cover
on
page
66.
●
Top-cover assembly. See Rear
panel
and
top-cover
assembly
on
page
66.
● Front-cover. See Front
cover
on
page
71.
● Engine-control unit assembly. See Engine
control
unit
(ECU)
assembly
on
page
80.
2.Remove four screws (callout 1) and then remove the laser/scanner assembly.
1
Figure 5-34 Remove the laser/scanner assembly
Reinstallation tip When replacing the laser/scanner assembly, be sure to transfer the
laser shutter arm from the old assembly to the new one.
84 Chapter 5 Removal and replacement ENWW
6 Troubleshooting
This chapter describes how to isolate and resolve printer problems, print-quality problems, and
media problems. Troubleshooting details are provided to resolve problems or to isolate replaceable
parts.
●
Basic
troubleshooting
●
Control-panel
lights
●
Jams
●
Print-quality
troubleshooting
●
Solving
paper-feed
problems
●
Functional
checks
●
Troubleshooting
tools
●
Solenoid,
sensors,
switches,
and
motor
ENWW 85
Basic troubleshooting
Troubleshooting checklist
Table 6-1 Basic troubleshooting Did the printer turn on?
Cause
Solution
No power is available because the power source, cable, or
switch failed.
1.Verify that the product is plugged in. Make sure that the
printer is plugged directly into a working wall receptacle.
2.Verify that the power cable is functional and that the
power switch is on.
3.If these conditions are correct, replace the engine
power assembly.
The printer motor does not rotate.1.Make sure that the printer is plugged directly into a
working wall receptacle.
2.Verify that the print-cartridge door is closed.
3.Verify that the print path is clear. If it is, verify that the
print-path paper-sensor arms are clean and functional.
4.Verify that the cable from the ECU to the motor is
connected.
5.If these conditions are correct, replace the ECU. See
Engine
control
unit
(ECU)
assembly
on
page
80.
6.If, after replacing the ECU, the printer motor still does
not rotate, replace the engine-power assembly. See
Engine-power
assembly
on
page
75.
7.If, after replacing the ECU and engine-power assembly,
the printer motor still does not rotate, replace the printer.
The motor rotates, but the lights are not on.
Is the product ready?
Cause
Solution
The formatter is damaged or has a loose connection.Verify that the formatter cables are connected correctly. If all
cables are undamaged and seated correctly but the problem
persists, replace the printer.
86 Chapter 6 Troubleshooting ENWW
Is the software installed correctly?
Cause
Solution
The software is not installed correctly, or an error occurred
during software installation.
Uninstall and then reinstall the product software. Make sure
that you use the correct installation procedure and the
correct port setting.
Connect the USB cable to the printer and the computer. Print a test page from the Printer Properties dialog box.
Does the product print from the computer?
Cause
Solution
The cable is not connected correctly.
Reconnect the cable.
An incorrect driver is selected.Select the correct driver.
Table 6-1 Basic troubleshooting (continued)
ENWW Basic troubleshooting 87
Control-panel lights
The Attention and Ready lights indicate printer status and errors.
Figure 6-1 Control-panel lights
Status-light patterns
On
Off
Blinking
Figure 6-2 Control-panel-light legend
Table 6-2 Control-panel light patterns
Light status
State of the printer
Action
Ready
The product is ready to print.
No action is necessary.
Processing data
The product is receiving of processing
data.
Wait for the job to print.
Cleaning mode
A cleaning page is printing.
Wait until the cleaning page has
finished and the printer is in the Ready
state. This could take up to two minutes.
88 Chapter 6 Troubleshooting ENWW
Light status
State of the printer
Action
Out of memory
The printer is out of memory.
The page you are printing might be too
complex for the printer's memory
capacity. Try lowering the resolution.
Attention: door open, no print cartridge,
or media jam
The printer is in an error state that
requires operator intervention.
Check the following:
● The print cartridge door must be
completely closed.
● The print cartridge is correctly
installed.
●
There is no media jam.
Printer initialization
The printer is initializing.
No action is necessary.
Fatal error
Turn off the printer, and then unplug
the printer power cord for 30 minutes.
Plug the printer power cord into the
power outlet, and then turn the printer
on.
If the error persists, replace the printer.
See Printer
exchange/parts
on
page
120.
Both lights are off.Make sure that the power switch is in
the on position.
Make sure that the printer power cord
is plugged into a active power outlet.
Unplug both ends of the printer power
cord, and then plug the power cord
back into the printer and the power
outlet.
Table 6-2 Control-panel light patterns (continued)
ENWW Control-panel lights 89
Jams
Clearing jams
CAUTION Do not use sharp objects, such as tweezers or needle nose pliers, to remove
jams. Damage caused by sharp objects will not be covered by the warranty.
CAUTION Always pull jammed media in the direction it would travel through the paper path.
Do not pull jammed media against the direction of travel through the paper path to avoid
damage to the printer.
To prevent damage to the printer when clearing jams, including jams in the output bin, always open
the print-cartridge door and remove the print cartridge. Keep the door open and the cartridge out until
the jam has been cleared. Opening the print-cartridge door and removing the print cartridge relieves
tension on the printer rollers, which prevents damage to the printer and makes the removal of
jammed pages easier.
Occasionally, media becomes jammed during a print job. You are notified of a media jam by an error
from the software and the printer control panel lights. See Control-panel
lights
on
page
88.
The following are some of the causes of media jams:
● The input trays are loaded improperly or are too full. See Loading
media
on
page
21.
NOTE When you add new media, always remove all of the media from the input tray
and straighten the stack of new media. This helps prevent multiple sheets of media from
feeding through the printer at one time, reducing media jams.
● The media does not meet HP specifications. See Media
specifications
on
page
16.
Typical media jam locations
● Print cartridge area: See HP LaserJet
1018
printer
on
page
3.
●
Input tray area: If the page is still sticking out of the input tray, gently try to remove it from the
input tray without tearing the page. If you feel resistance, see HP LaserJet
1018
printer
on
page
3.
●
Output path: If the page is sticking out of the output bin, see HP LaserJet
1018
printer
on
page
3.
NOTE There might be loose toner in the printer after a media jam. This toner clears up
after a few sheets are printed.
Removing a jammed page
Use the procedures in this section to remove a jam.
CAUTION Media jams might result in loose toner on the page. If you get any toner on your
clothes, wash them in cold water. Hot water will permanently set the toner into the fabric.
90 Chapter 6 Troubleshooting ENWW
CAUTION To prevent damage to the printer when clearing jams, including jams in the output
bin, always open the print cartridge door and remove the print cartridge.
To prevent damage to the print cartridge, minimize its exposure to direct light. Cover the print
cartridge with a sheet of paper.
1.Open the print cartridge door, and remove the print cartridge.
2.Grasp the middle edge of the side of the media that is most visible, and carefully pull it free from
the printer.
CAUTION Do not use sharp objects, such as tweezers or needle nose pliers, to remove
jams. Damage caused by sharp objects will not be covered by the warranty.
CAUTION Always pull jammed media in the direction it would travel through the paper
path. Do not forcefully pull jammed media against the direction of travel through the
paper path to avoid damage to the printer.
ENWW Jams 91
3.When you have removed the jammed media, replace the print cartridge, and close the print
cartridge door.
After clearing a media jam, you might need to turn the printer off then on again.
NOTE When you add new media, remove all of the media from the input tray and
straighten the stack of new media.
92 Chapter 6 Troubleshooting ENWW
Print-quality troubleshooting
Print-cartridge problems
Checking the print cartridge
Image-formation defects are frequently the result of problems in the print cartridge. If there is any
doubt, always replace the print cartridge before troubleshooting image defects.
Hint If the transfer roller was recently replaced, print-quality problems might be the result of
skin oils on the black-sponge portion of the transfer roller. Do not touch the black-sponge
portion of the transfer roller when replacing it.
Use the following checklist to make sure that the print cartridge is still operable.
●
Make sure that the print cartridge is installed properly and the shipping tape is removed.
●
Check the print cartridge to see if it has been disassembled or refilled.
● Inspect the print cartridge to see if toner is leaking through worn seals.
● Check the surface of the photosensitive drum in the cartridge to see if it has been damaged or
scratched. Touching the drum contaminates the photosensitive surface and can cause spotting
and image defects.
● Blurred areas on printed pages indicate that the photosensitive drum in the cartridge has been
overexposed to light. Because overexposure to light causes permanent damage to the
photosensitive drum, the cartridge should be replaced.
To redistribute toner in the print cartridge
Before installing a new print cartridge or when toner begins to run low, redistribute the toner by
rocking the cartridge back and forth five or six times.
Solving print-quality problems
Use the following tables to help solve problems with printed pages.
If the problem occurs when printing, see Solving
paper-feed
problems
on
page
105.
Table 6-3 Solving print-quality problems
No page is produced.
Cause
Solution
The product is not plugged in or power switch is off.
Make sure that the product is plugged into a live wall outlet
or power strip and that the on/off switch is in the on position.
The printer is registering a jam.
Check the lights. If the Attention light is flashing, the printer
might be jammed. Clear the jam.
The computer cable is loose.Make sure that the cable between the product and the
computer is securely connected.
ENWW Print-quality troubleshooting 93
Output pages are blank.
Cause
Solution
The tape was not removed from the print cartridge.
Remove the print cartridge, remove the tape, and reinstall
the print cartridge.
The print cartridge is out of toner.
Replace the print cartridge
The high-voltage connection between the printer and the
print cartridge has been interrupted.
Perform a High-voltage-contacts
check
on
page
110.
The laser/scanner shutter lever is not installed correctly or is
broken.
If the ECU was recently replaced, make sure that the laser/
scanner shutter lever was inserted correctly through the
plastic guide in the sheet-metal ECU cover when the cover
was reinstalled. See Engine
control
unit
(ECU)
assembly
on
page
80.
If the laser/scanner shutter is broken, replace the printer.
See Printer
exchange/parts
on
page
120.
Parts of the page around the edges are not printing.
Cause
Solution
The printer cannot print all the way to the edge of the paper.
The printer has minimum margins on each edge of
approximately 6 mm (0.25 inch).
To make the image fit into this printable area, slightly reduce
the size of the image. Open the Printer Properties dialog
box, and then select Printing Preferences. Select the
Effects tab and then click on the Print Document On check
box in the Fit to Page area of the dialog box. if the a page
size other than Letter is used, select the appropriate page
size from the drop down menu. Click OK to close the
Printing Preferences dialog box, and then click OK again
to close the Printer properties dialog box.
The reduction setting is incorrect.
To make changes to the reduction settings, open the Printer
Properties dialog box, and then select Printing
Preferences. Select the Effects tab and then change the
reduction settings in the Fit to Page area of the dialog box.
Click OK to close the Printing Preferences dialog box, and
then click OK again to close the Printer properties dialog
box.
The paper-size setting is incorrect.
To make a change to the paper-size settings, open the
Printer Properties dialog box, and then select Printing
Preferences. Select the correct paper-size setting from the
Size is drop down menu. Click OK to close the Printing
Preferences dialog box, and then click OK again to close
the Printer properties dialog box.
Table 6-3 Solving print-quality problems (continued)
94 Chapter 6 Troubleshooting ENWW
Random toner specks appear on the printed page.
Cause
Solution
The media in use does not meet HP specifications (for
example, it is too moist or too rough).
Make sure that the media meets specifications detailed in
the HP LaserJet Printer Family Print Media Guide.
The print path is dirty.Clean the print path (see Cleaning
the
print
path
on
page
26).
Table 6-3 Solving print-quality problems (continued)
ENWW Print-quality troubleshooting 95
Characters are only partially printed (also referred to as dropouts).
Cause
Solution
A single sheet of paper is defective.
Try reprinting the job.
The print density needs to be adjusted.
Open the Printer Properties dialog box, and then select the
Configure tab. Use the slide bar in the Print Density area
of the dialog box to change the print density setting. Click
OK to close the Printer Properties dialog box.
The moisture content of the paper is inconsistent, or the
paper has moist or wet spots on the surface.
Make sure that the media meets the specifications detailed
in the HP LaserJet Printer Family Print Media Guide.
The paper was damaged by inconsistent manufacturing
processes.
Make sure that the media meets the specifications detailed
in the HP LaserJet Printer Family Print Media Guide.
Economode is enabled.
Open the Printer Properties dialog box, and then select
Printing Preferences. Select the Finishing tab, and then
clear the EconoMode (Save Toner) check box. Click OK to
close the Printing Preferences dialog box, and then click
OK again to close the Printer properties dialog box.
The wrong type of media is selected in the Printer
Preferences dialog box.
Open the Printer Properties dialog box, and then click
Printing Preferences. Select the correct media type from
the Type Is drop down menu. Click OK to close the Printing
Preferences dialog box, and then click OK again to close
the Printer properties dialog box.
The print cartridge is depleted or damaged.
Replace the print cartridge.
Rarely, the fuser might be damaged.Replace the fuser.
Table 6-3 Solving print-quality problems (continued)
96 Chapter 6 Troubleshooting ENWW
Vertical black lines appear on the printed page.
Cause
Solution
The print cartridge is depleted or damaged.
Replace the print cartridge.
Rarely, the fuser is defective.Replace the fuser.
The printed page has a gray background.
Cause
Solution
The wrong type of media is selected in the Printer
Preferences dialog box.
Open the Printer Properties dialog box, and then click
Printing Preferences. Select the correct media type from
the Type Is drop down menu. Click OK to close the Printing
Preferences dialog box, and then click OK again to close
the Printer properties dialog box.
The print density is too high.
Open the Printer Properties dialog box, and then select the
Configure tab. Use the slide bar in the Print Density area
of the dialog box to change the print density setting. Click
OK to close the Printer Properties dialog box.
The media basis weight is too high.
Change the media to a lower basis weight.
The print path needs to be cleaned.
Clean the print path (see Cleaning
the
print
path
on
page
26).
The printer is operating in humidity or temperature
conditions that are not within the recommended ranges.
Move the product to a different location.
The print cartridge is worn, damaged, or has been refilled.Replace the print cartridge.
Table 6-3 Solving print-quality problems (continued)
ENWW Print-quality troubleshooting 97
Toner smears appear on the printed page.
Cause
Solution
If toner smears appear on the leading edge of the media, the
media guides might be dirty.
Wipe the media guides with a dry, lint free cloth.
The print path needs to be cleaned.
Clean the print path (see Cleaning
the
print
path
on
page
26).
The media in use does not meet HP specifications (for
example, it is too moist or too rough). Make sure that the media meets the specifications detailed
in the HP LaserJet Printer Family Print Media Guide.
The print cartridge is worn or damaged.
Replace the print cartridge.
The wrong type of media is selected in the Printer
Preferences dialog box.
Open the Printer Properties dialog box, and then click
Printing Preferences. Select the correct media type from
the Type Is drop down menu. Click OK to close the Printing
Preferences dialog box, and then click OK again to close
the Printer properties dialog box.
The fuser is damaged.
Perform the Half
self-test
functional
check
on
page
107.
If the error persists, replace the fuser.
If, after replacing the fuser, the error persists, replace the
ECU.
The toner is loose, and it does not stay attached to the printed page.
Cause
Solution
The media in use does not meet HP specifications (for
example, it is too moist or too rough).
Make sure that the media meets the specifications detailed
in the HP LaserJet Printer Family Print Media Guide.
The print path needs to be cleaned.
Clean the print path. See Cleaning
the
print
path
on
page
26.
The wrong type of media is selected in the Printer
Preferences dialog box.
Open the Printer Properties dialog box, and then click
Printing Preferences. Select the correct media type from
Table 6-3 Solving print-quality problems (continued)
98 Chapter 6 Troubleshooting ENWW
The toner is loose, and it does not stay attached to the printed page.
Cause
Solution
the Type Is drop down menu. Click OK to close the Printing
Preferences dialog box, and then click OK again to close
the Printer properties dialog box.
The power strip is not working correctly or the ac power
does not meet the specified requirements.
Plug the product directly into an ac outlet. Ensure that the
power source is clean.
The printer is operating in humidity or temperature
conditions that are not within the recommended ranges.
Move the product to a different location.
The fuser is damaged.Perform a Half
self-test
functional
check
on
page
107.
If the error persists, replace the fuser.
If, after replacing the fuser, the error persists, replace the
engine power assembly.
Table 6-3 Solving print-quality problems (continued)
ENWW Print-quality troubleshooting 99
Repetitive vertical defects appear on the printed page.
Cause
Solution
The internal parts have toner on them.
If the defects occur on the back of the page, the problem will
probably correct itself after a few more printed pages.
Otherwise, clean the printer (see Cleaning
the
print
path
on
page
26).
The wrong type of media is selected in the Printer
Preferences dialog box.
Open the Printer Properties dialog box, and then click
Printing Preferences. Select the correct media type from
the Type Is drop down menu. Click OK to close the Printing
Preferences dialog box, and then click OK again to close
the Printer properties dialog box.
If the repetitive mark occurs at equal distance on the page,
then the print cartridge, transfer roller, paper-pickup
assembly, or fuser is damaged.
Use the repetitive-image-defect ruler to identify the spacing.
Check the appropriate assembly and replace it if necessary.
(
Repetitive-image-defect
ruler
on
page
112)
Characters are poorly formed and are producing hollow images.
Cause
Solution
The wrong type of media is selected in the Printer
Preferences dialog box.
Open the Printer Properties dialog box, and then click
Printing Preferences. Select the correct media type from
the Type Is drop down menu. Click OK to close the Printing
Preferences dialog box, and then click OK again to close
the Printer properties dialog box.
The media is too slick or too thick.Try a different media. Make sure that the media meets
specifications detailed in the HP LaserJet Printer Family
Print Media Guide.
Table 6-3 Solving print-quality problems (continued)
100 Chapter 6 Troubleshooting ENWW
Pages are skewed.
Cause
Solution
The media is loaded incorrectly.
Reload the media, and make sure that the side and rear
media guides are not too tight against the media stack or too
loose.
The input tray is too full.
Remove some of the sheets. The main input tray can hold
up to 150-sheets of 75-g/m
2
(20-lb) bond-weight paper (or
fewer pages of heavier media), or a stack no higher than 25
mm (0.98 inch). The priority input tray can hold up to ten
sheets of 75-g/m
2
(20-lb) bond-weight paper, one sheet of
heavier media, or one envelope or card.
The media in use does not meet HP specifications (for
example, it is too moist or too rough).
Make sure that the media meets the specifications detailed
in the HP LaserJet Printer Family Print Media Guide.
The printed page has curls or waves.
Cause
Solution
The printer is operating in humidity or temperature
conditions that are not within the recommended ranges.
Move the product to a different location.
The wrong type of media is selected in the Printer
Preferences dialog box.
Open the Printer Properties dialog box, and then click
Printing Preferences. Select the correct media type from
the Type Is drop down menu. Click OK to close the Printing
Preferences dialog box, and then click OK again to close
the Printer properties dialog box.
The media in use does not meet HP specifications (for
example, it is too moist or too rough).
Make sure that the media meets the specifications detailed
in the HP LaserJet Printer Family Print Media Guide.
The media was in the input tray for too long.1.Turn the stack of media over and put it back in the tray.
2.Rotate the media 180° and put it back in the tray.
Table 6-3 Solving print-quality problems (continued)
ENWW Print-quality troubleshooting 101
Large amounts of toner are scattered around the characters.
Cause
Solution
The media resistivity is too high. (This most often happens
when transparencies acquire a static charge.)
1.Use a different media. Make sure that the media meets
the specifications detailed in the HP LaserJet Printer
Family Print Media Guide.
2.Turn the stack of media over and put it back in the tray.
3.Use media (particularly transparencies) that is
designed for laser printers.
The printer is operating in humidity or temperature
conditions that are not within the recommended ranges
(often, the humidity is too low).
Move the product to a different location.
Vertical white stripes appear.
Cause
Solution
The toner is low or poorly distributed in the print cartridge.
Gently rock the print cartridge back and forth to redistribute
the toner (see the illustration on the print cartridge). Replace
the print cartridge.
The media you are using does not meet HP specifications
(for example, it is too moist or too rough).
Make sure that the media meets the specifications detailed
in the HP LaserJet Printer Family Print Media Guide.
Table 6-3 Solving print-quality problems (continued)
102 Chapter 6 Troubleshooting ENWW
Printout is faded in areas.
Cause
Solution
If the entire page is light, the print density is too light or
Econmode might be turned on.
Open the Printer Properties dialog box, and then click
Printer preferences. Select the Finishing tab and make
sure that the EconoMode (Save Toner) check box is not
selected. Select OK to close the Printer Preferences dialog
box. Select the Configure tab in the Printer Properties
dialog box. Use the slide bar in the Print Density area of the
dialog box to change the print density setting. Click OK to
close the Printer Properties dialog box.
The printer is operating in humidity or temperature
conditions that are not within the recommended ranges.
Move the product to a different location. Increase airflow
around the printer to prevent condensation on the laser/
scanner lens.
The toner is low or poorly distributed in the print cartridge.Gently rock the print cartridge back and forth to redistribute
the toner (see the illustration on the print cartridge). Replace
the print cartridge.
Wrinkles or creases appear in the printout
Cause
Solution
The media is not properly loaded.
Make sure the media is correctly loaded.
Damage or reused media is being used.
Do not use media that is damaged or has already been put
through a copier or printer.
The media you are using does not meet HP specifications
(for example, it is too moist or too rough).
Make sure that the media meets the specifications detailed
in the HP LaserJet Printer Family Print Media Guide.
Table 6-3 Solving print-quality problems (continued)
ENWW Print-quality troubleshooting 103
Droplets of water are deposited on the trailing edge
Cause
Solution
Moisture in the printer is condensing on the fuser assembly.
In excessively hot and humid areas, media retains moisture.
NOTE Water droplets do not damage the printer.
Try moving the printer to a less humid area. Try a different
media.
Table 6-3 Solving print-quality problems (continued)
104 Chapter 6 Troubleshooting ENWW
Solving paper-feed problems
Use the following table to solve problems related to moving paper or documents through the product.
Table 6-4 Solving paper-feed problems
Pages are coming out curled or wrinkled. Cause
Solution
Paper curl is inherent to the laser printing processes, and
occurs when paper is subjected to heat. Paper curl tends to
relax as the paper cools while resting on a flat surface.
Make sure that the media meets the specifications detailed
in the HP LaserJet family Print Media Guide.
Paper is not stored properly.
Whenever possible, store paper in its sealed ream at room
temperature.
The media is too long for the printer output bin.
Use the output-bin extension.
The printer is operating in humidity or temperature
conditions that are not within the recommended ranges.
Move the product to a different location.
The wrong type of media is selected in the Printer
Preferences dialog box.
Open the Printer Properties dialog box, and then click
Printing Preferences. Select the correct media type from
the Type Is drop down menu. Click OK to close the Printing
Preferences dialog box, and then click OK again to close
the Printer properties dialog box.
The media you are using does not meet HP specifications
(for example, it is too moist or too rough).
Make sure that the media meets the specifications detailed
in the HP LaserJet Printer Family Print Media Guide.
The media was in the input tray for too long.1.Turn the stack of media over and put it back in the tray.
2.Rotate the media 180° and put it back in the tray.
Print is misaligned on the page (skewed pages).
Cause
Solution
The media is loaded incorrectly.
Reload the media, and make sure that the side and rear
media guides are not too tight against the media stack or too
loose.
The input tray is too full.
Remove some of the sheets. The main input tray can hold
up to 150 sheets of 75 g/m
2
(20-lb) bond-weight paper (or
fewer pages of heavier media), a stack no higher than 25
mm (.98 inch). The priority input tray can hold up to ten
sheets of 75 g/m
2
(20-lb) bond-weight paper, one sheet of
heavier media, or one envelope or card.
The media you are using does not meet HP’s specifications
(for example, it is too moist or too rough).
Make sure that the media meets the specifications detailed
in the HP LaserJet Printer Family Print Media Guide.
ENWW Solving paper-feed problems 105
The printer feeds multiple sheets or jams frequently from the main input tray or priority input slot.
Cause
Solution
The paper guides are not adjusted correctly or the paper is
not far enough forward.
Slide the guides against the sides of the stack in the main
input tray or the priority input slot to center the paper. Make
sure that the guides are not adjusted too tightly.
The stack is not neat or not aligned well on all sides.
Remove the media, and then align stack and replace it.
The main input tray is overfilled.
Remove some of the sheets. The main input tray can hold
up to 250 sheets of 75 g/m
2
(20-lb) bond-weight paper (less
for heavier paper) or from 20 to 30 envelopes.
The priority input slot is overfilled.
Remove media or feed single sheets. The priority input slot
is designed for optimal feeding of single sheets, especially
when heavier media is used. It can hold up to ten sheets of
75 g/m
2
(20-lb) bond-weight paper (one sheet of heavier
paper) or one envelope.
The paper was poorly cut by the manufacturer and is
sticking together.
“Break” the ream of paper by curving it into an upside-down
u-shape; this can effectively decrease multifeeds. Also try
turning the paper around to feed the opposite end first, or
use a different type of paper.
The paper does not meet HP specifications for print media.
Make sure that the media meets the specifications detailed
in the HP LaserJet Printer Family Print Media Guide.
The output capacity was exceeded in the output bin.
Do not allow more than 125 sheets of 75 g/m
2
(20-lb) bond-
weight paper (less for heavier paper) to fill the paper output
bin.
The pickup roller is dirty.
Clean the pickup roller.
The pickup roller is damaged.
Replace the pickup roller.
The separation pad is damaged.
Replace the separation pad.
A sensor is not operating correctly.The chances of a sensor failing are very small. However,
debris around the sensor arms can cause them to register a
jam. Three sensors are in the printer: top-of-page sensor,
paper-width sensor, and delivery sensor. Check them to
ensure that the sensor arms can move freely. On the rare
occasion of a failed sensor, replace the printer.
Table 6-4 Solving paper-feed problems (continued)
106 Chapter 6 Troubleshooting ENWW
Functional checks
This section includes five functional checks for troubleshooting.
Half self-test functional check
The print process can be subdivided into the following stages:
●
Image-formation stage (charges the drum and writes a latent image to the drum with the laser)
● Development stage (forms a toner image on the drum)
● Transfer stage (transfers the image to media)
●
Cleaning stage (removes excess toner from the drum)
●
Fusing stage (applies heat and pressure to make the image permanent on the media)
To perform a half self-test check
The purpose of the half self-test check is to begin the printing process and then interrupt it in the
middle. Examining the printer components at that point allows you to determine which stage in the
print process is malfunctioning.
1.Open the Printer Properties dialog box. Select Print Test Page to print a test page. Click OK
to close the HP LaserJet 1018 test page troubleshooting dialog box. Click OK again to close
the Printer Properties dialog box.
2.Open the print-cartridge door the instant the leading edge of the paper exits the printer.
3.Remove the print cartridge.
4.Open the print cartridge drum shield to view the drum surface. If a dark and distinct toner image
is present on the drum surface, then the first two functions of the electrophotographic process
are functioning (image-formation and development). Any failure is occurring in the transfer or
fusing stage.
To perform other checks
If no image appears on the photosensitive drum, perform these checks:
1.Make sure that you remove the entire length of the sealing tape from the print cartridge before
you install the cartridge. If the tape is not removed, then toner cannot reach the drum.
2.Perform a drum-rotation functional check to ensure that the drum is rotating (see Drum-rotation
functional
check on
page
109).
3.Perform a high-voltage contact check (see High-voltage-contacts
check
on
page
110).
ENWW Functional checks 107
4.Check the fuser connections (callout 1) on the engine-power assembly. Also check the high
voltage connection at the back side of the printer.
NOTE The following figure shows the HP LaserJet 1010 series products. The
connections are located at the same place on the HP LaserJet 1018 printer.
Figure 6-3 Check the fuser connections (HP LaserJet 1010 series shown)
If a transfer problem exists, replace the transfer roller (do not touch the black-sponge portion of the
transfer roller). If a fuser problem exists, first check to make sure that the four cables to the fuser are
correctly seated in the engine-power assembly.
108 Chapter 6 Troubleshooting ENWW
Drum-rotation functional check The photosensitive drum, which is located in the print cartridge, must rotate in order for the print
process to work. The photosensitive drum receives its drive from the main motor through a system of
gears on the right side of the printer.
NOTE This test is especially important if refilled print cartridges have been used.
1.Open the print-cartridge door.
2.Remove the print cartridge.
3.Mark the drive gear on the cartridge with a felt-tipped marker. Note the position of the mark.
4.Install the print cartridge and close the print-cartridge door. The startup sequence should rotate
the drum enough to move the mark.
5.Open the print-cartridge door and inspect the gear that was marked in step 3. Verify that the
mark moved.
If the mark did not move, inspect the drive shaft that moves into the print-cartridge area when the
print-cartridge door is closed to make sure that it is meshing with the print cartridge. If the drive shaft
looks functional and the drum does not move, replace the print cartridge. If the drive shaft is
damaged, replace the printer.
ENWW Functional checks 109
High-voltage-contacts check
The high-voltage contacts in the printer must have a good connection with the contacts on the print
cartridge to provide the necessary voltages for the electrophotographic processes.
To check the print-cartridge contacts Remove the print cartridge and visually inspect the three connection points (callout 1) on the end of
the print cartridge. If they are dirty or corroded, clean the connection. If they are damaged, replace
the print cartridge.
NOTE Use a dry cloth to clean the connections.
Figure 6-4 Print-cartridge high-voltage contacts
110 Chapter 6 Troubleshooting ENWW
To check the printer high-voltage contacts The printer has three spring-loaded pins (callout 1) that make contact with the high-voltage points on
the print cartridge. Verify that the pins are not dirty or corroded and that the spring-loading action is
functional. If the pins are dirty or obstructed, clean them. If they are damaged, replace the printer.
Figure 6-5 Printer high-voltage contacts
ENWW Functional checks 111
Troubleshooting tools
If the printer output has a consistent, repetitive defect, then use the following ruler to predict which
part needs to be replaced based on the measured distance between the repetitions of the defect.
Repetitive-image-defect ruler
First occurrence of print defect (0.00 inches)
Transfer roller 46.3 mm (1.82 inches)
Print cartridge 37.7 mm (1.48 inches)
Print cartridge 32.0 mm (1.26 inches)
Paper-pickup assembly 55.2 mm (2.17 inches)
Fuser (fixing assembly) 56.5 mm (2.22 inches)
Fuser (fixing assembly) 41.0 mm (1.61 inches)
Print cartridge 76.3 mm (3.00 inches)
Figure 6-6 Repetitive-image-defect ruler
112 Chapter 6 Troubleshooting ENWW
Circuit diagram 13 24
6
5
4
3
21
D
C
B
A
Pick-up solenoid
SW101
Powerswitch
M
1324
Laser Drive
PCB
BD
sensor
Laser / Scanner unit
Door switch
SW301
M
1324
INL101
FU101
Fuse
FU102
Fuse
100-127V only
2468
13579
21
TP1
1 2
H701
21
TH1
12
J1102
12
12
FSRTH
GND
J102
J204
Thermistor
Fixing heater
Thermal fuse
Fixing film unit
123
PS803
1 32
1 32
Paper delivery
sensor
J203
3 12
J802
1 2
1 2
SL001
Paper delivery sensor PCB
CPUD
+24V
+3.3V
POSNS
GND
1 32
Inlet
1324
1324
13579
2468
GND
/VDO
VDO
GND
CNT1
CNT0
GND
+5V
/BDI
J002
J801
GND
/DEC
/ACC
+24VR
J904
J905
USB interface
Scanner motor
Fixing unit
6 4 25 3 1
FWD
/SI
/SO
/CLK
/STRB
GND
J901
Formatter
Engine controller PCB
12
J201
Power supply PCB
135791113151719
24681012141618
21
2022
23
24
25
26
Centronicsinterface
J2
J902
132
132
ACH
ACN
1 32 4
1 32 4
4 23
1
123
PS802
123
PS801
Topof
sensor
Paper width
sensor
Top of page / paper width sensor PCB
J801
+3.3V
PISNS
PWSNS
GND
J202
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
+24VR
GND
+24VR
GND
+24VR
GND
+3.3V
+24V
/POSNS
GND
/PISNS
PWSV
/PWSNS
PRPWM
PRAC
DVAC
TRNDC
TRPDC
FSRD
FSRTH
RLYD
TRCRNT
DOSNS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
1324
1324
J001
/MB
MB
/MA
MA
J909
Main motor
4231
4231
13
5
791113
2
4
68101214
1357911132468101214
+24VR
CPUD
+5V
GND
GND
+3.3V
/RESETO
/SCLK
/SC
/BDO
GND
/VDO
VDO
GND
J910
2
1
1
2
ACN
ACH
P5
J5
J6
2
1
page
Figure 6-7 Circuit diagram
ENWW Troubleshooting tools 113
Solenoid, sensors, switches, and motor
The following figure shows the locations of the solenoid, sensors, and switches.
Figure 6-8 Solenoid, sensors, switches, and motor
1
The door switch detects whether or not the print-cartridge door is closed. Printing cannot continue until the print-
cartridge door is closed.
2
Power switch
3
The paper-width sensor senses the width of the media.
4
The paper-delivery sensor senses when media has successfully moved out of the fusing area.
5
The top-of-page sensor detects the leading and trailing edges of the media. It synchronizes the photosensitive drum
and the top of the media.
6
Solenoid
7
Motor
114 Chapter 6 Troubleshooting ENWW
7 Parts and diagrams
This chapter provides an exploded view that shows the replaceable parts of the printer, tables of
replaceable parts, and links to other resources.
●
Ordering
parts
and
supplies
●
Accessories
and
consumables
●
Printer
exchange/parts
●
Major
components
●
Alphabetical
parts
list
●
Numerical
parts
list
ENWW 115
Ordering parts and supplies
This section describes Web resources for ordering parts and for technical support, as well as
resources for ordering related documentation and software.
Parts
Order replacement parts from the following Web site: http://www.hp.com/
go/hpparts
Related documentation and software
Order documentation and software from the Web sites listed in Table
7
-
1
Technical
support
websites
on
page
116.
Table 7-1 Technical support websites
HP Customer Care Online
Software drivers, support documentation, and answers to
frequently asked questions
http://www.hp.com/
go/support
HP Technical Training (North America)
Classes and schedules
http://hp.com/
go/onlinelearning
Parts
Parts information
http://www.hp.com/
go/hpparts
Parts that wear The parts that wear on the product are listed in chapter 3 of this manual. Parts are available directly
from Hewlett-Packard at the following websites:
● HP Parts Store: http://www.hp.com/
buy/parts
●
Partsurfer: http://partsurfer.hp.com
●
HP Parts Portal: http://www.hp.com/
go/hpparts
116 Chapter 7 Parts and diagrams ENWW
Accessories and consumables
Accessories
Table 7-2 Accessories
Product name
Description
Product number
Part number
Exchange number
Replacement print
cartridge
2,000–page cartridge
N/A
Q2612A
Cables and interface
accessories
3-meter IEEE-1284
parallel cable
N/A
C2951A
Cables and interface
accessories
1.8-meter (6-feet)
USB cable
NA
8120-8485
Cables and interface
accessories
.6-meter (2-feet) USB
cable
Q2460A
8121-0712
Cables and interface
accessories
Power cord, US/
Canada
NA
8120-6812
Cables and interface
accessories
Power cord, Europe
N/A
8120-6811
Cables and interface
accessories
Power cord,
Switzerland
N/A
8120-6815
Cables and interface
accessories
Power cord, UK
N/A
8120-6809
Cables and interface
accessories
Power cord, Danish
N/A
8120-6814
Cables and interface
accessories
Power cord, SA
N/A
8120-6813
Cables and interface
accessories
Power cord, Israel
N/A
8120-6800
Toner cloth
Ideal for wiping up
toner spills and
cleaning the printer
N/A
5090-3379
CD ROM
N/A
CB419–60101
CD-Service and
Support Training
N/A
Q2460-60106
Service Manual, HP
LJ 1018 printer
N/A
CB419-90938
1
(NOTE: If two parts are listed for one country/region, you can use either part regardless of the output rating.)
ENWW Accessories and consumables 117
Common hardware The product uses common Phillips-head screws as fasteners.
How to use the parts lists and diagrams
The figures in this chapter illustrate the major subassemblies in the product. A table follows the
exploded assembly diagram. Each table lists the reference designator, the associated part number
for the item, and a description of the part.
Parts that have no reference designator or part number are not field replaceable units (FRUs) and
cannot be ordered. Failure of a part that is not listed as replaceable and is not included with a listed
FRU requires replacement of the entire printer.
While looking for a part number, pay careful attention to the voltage listed in the description column
to make sure that the part number selected is for the correct product model.
118 Chapter 7 Parts and diagrams ENWW
Printer exchange/parts
Figure 7-1 HP LJ 1018 product
ENWW Printer exchange/parts 119
Table 7-3 Printer exchange/parts
Ref Description Part number Qty
HP LJ 1018-110V printer (replacement) CB419-60056 1
HP LJ 1018-110V printer (exchange engine with formatter) CB419-69056 1
HP LJ 1018–110V printer (exchange engine without formatter) CB419–67001 1
HP LJ 1018-220V printer (replacement) CB419-60055 1
HP LJ 1018-220V printer (exchange engine with formatter) CB419-69055 1
HP LJ 1018–220V printer (exchange engine without formatter) CB419–67002 1
not shown HP LJ 1018 formatter CB440–60001 1
not shown Nameplate HP LJ CB419–00002 1
120 Chapter 7 Parts and diagrams ENWW
ENWW Printer exchange/parts 121
Major components
Figure 7-2 Major components (HP LJ 1010 series shown)
122 Chapter 7 Parts and diagrams ENWW
Table 7-4 Major components
Ref Description Part number Qty
1 Paper pickup tray assembly RM1-2079-000CN 1
2
Delivery tray assembly
RM1-0659-000CN 1
3
Separation pad assembly
RM1-0648-000CN 1
4
Roller, pickup
RL1-0266-000CN 1
5 Fuser (fixing assembly) 110V to 127V RM1-2086-000CN 1
5 Fuser (fixing assembly) 220V to 240V RM1-2087-000CN 1
6 Engine power supply 110V to 127V RM1-2315-000CN 1
6 Engine power supply 220V to 240V RM1-2316-000CN 1
7 Laser/scanner assembly RM1-2084-000CN 1
8 Engine control assembly RM1-2314-000CN 1
9 Transfer roller assembly RM1-2093-000CN 1
10 Paper pickup assembly RM1-2091-000CN 1
12 Door Link Clip (Stopper) RM1–1957–000CN 1
ENWW Major components 123
Alphabetical parts list
Table 7-5 Alphabetical parts list
Description
Part number
Table and page
Delivery tray assembly
RM1-0659-000CN
Major
components
on
page
123
Door Link Clip (Stopper)
RM1–1957–000CN
Major
components
on
page
123
Engine control assembly
RM1-2314-000CN
Major
components
on
page
123
Engine power supply 110V to 127V
RM1-2315-000CN
Major
components
on
page
123
Engine power supply 220V to 240V
RM1-2316-000CN
Major
components
on
page
123
Fuser (fixing assembly) 110V to 127V
RM1-2086-000CN
Major
components
on
page
123
Fuser (fixing assembly) 220V to 240V
RM1-2087-000CN
Major
components
on
page
123
HP LJ 1018-110V printer (exchange engine with formatter)
CB419-69056
Printer
exchange/parts
on
page
120
HP LJ 1018-110V printer (replacement)
CB419-60056
Printer
exchange/parts
on
page
120
HP LJ 1018-220V printer (exchange engine with formatter)
CB419-69055
Printer
exchange/parts
on
page
120
HP LJ 1018-220V printer (replacement)
CB419-60055
Printer
exchange/parts
on
page
120
HP LJ 1018–110V printer (exchange engine without formatter)
CB419–67001
Printer
exchange/parts
on
page
120
HP LJ 1018–220V printer (exchange engine without formatter)
CB419–67002
Printer
exchange/parts
on
page
120
HP LJ 1018 formatter
CB440–60001
Printer
exchange/parts
on
page
120
Laser/scanner assembly
RM1-2084-000CN
Major
components
on
page
123
Nameplate HP LJ
CB419–00002
Printer
exchange/parts
on
page
120
Paper pickup assembly
RM1-2091-000CN
Major
components
on
page
123
Paper pickup tray assembly
RM1-2079-000CN
Major
components
on
page
123
Roller, pickup
RL1-0266-000CN
Major
components
on
page
123
124 Chapter 7 Parts and diagrams ENWW
Description
Part number
Table and page
Separation pad assembly
RM1-0648-000CN
Major
components
on
page
123
Transfer roller assembly RM1-2093-000CN
Major
components
on
page
123
Table 7-5 Alphabetical parts list (continued)
ENWW Alphabetical parts list 125
Numerical parts list
Table 7-6 Numerical parts list
Part number
Description
Table and page
CB419-60055
HP LJ 1018-220V printer (replacement)
Printer
exchange/parts
on
page
120
CB419-60056
HP LJ 1018-110V printer (replacement)
Printer
exchange/parts
on
page
120
CB419-69055
HP LJ 1018-220V printer (exchange engine with formatter)
Printer
exchange/parts
on
page
120
CB419-69056
HP LJ 1018-110V printer (exchange engine with formatter)
Printer
exchange/parts
on
page
120
CB419–00002
Nameplate HP LJ
Printer
exchange/parts
on
page
120
CB419–67001
HP LJ 1018–110V printer (exchange engine without formatter)
Printer
exchange/parts
on
page
120
CB419–67002
HP LJ 1018–220V printer (exchange engine without formatter)
Printer
exchange/parts
on
page
120
CB440–60001
HP LJ 1018 formatter
Printer
exchange/parts
on
page
120
RL1-0266-000CN
Roller, pickup
Major
components
on
page
123
RM1-0648-000CN
Separation pad assembly
Major
components
on
page
123
RM1-0659-000CN
Delivery tray assembly
Major
components
on
page
123
RM1-2079-000CN
Paper pickup tray assembly
Major
components
on
page
123
RM1-2084-000CN
Laser/scanner assembly
Major
components
on
page
123
RM1-2086-000CN
Fuser (fixing assembly) 110V to 127V
Major
components
on
page
123
RM1-2087-000CN
Fuser (fixing assembly) 220V to 240V
Major
components
on
page
123
RM1-2091-000CN
Paper pickup assembly
Major
components
on
page
123
RM1-2093-000CN
Transfer roller assembly
Major
components
on
page
123
RM1-2314-000CN
Engine control assembly
Major
components
on
page
123
RM1-2315-000CN Engine power supply 110V to 127V
Major
components
on
page
123
126 Chapter 7 Parts and diagrams ENWW
Part number
Description
Table and page
RM1-2316-000CN
Engine power supply 220V to 240V
Major
components
on
page
123
RM1–1957–000CN Door Link Clip (Stopper)
Major
components
on
page
123
Table 7-6 Numerical parts list (continued)
ENWW Numerical parts list 127
128 Chapter 7 Parts and diagrams ENWW
Index
A
ac bias 46
ac power distribution 44
accessories, ordering 117
acoustic emissions 8
alignment, troubleshooting 101,
105
Attention light 15, 88
B
back panel, removing 66
background, gray 97
beam detect (BD) signal 46
bidirectional communications 39
bin, output
capacity 5
extension, replacing 36, 63
jams, clearing 90
locating 3
black dots, troubleshooting 95,
102
blank pages, troubleshooting 93
block diagrams
image formation 45
product functions 41
breaking paper reams 106
buffer memory 40
buttons 15
buttons, control panel 15
C
Canadian DOC regulations 11
Cancel Job button 15
capacity, trays and bins 5
card stock specifications 20
cartridge area, cleaning 26
cartridge door
locating 3
removing 66
cartridges
checking 93, 110
drum rotation check 109
extending life of 39
life expectancies 24
operations 46, 47
part numbers 117
recycling 10
redistributing toner 93
refilled 10
removing 55
central processing unit (CPU),
formatter 39
characters, misprinted 96, 100
charging roller
operations 46
power supply 44
checklists
preservice 54
print cartridge inspection 93
troubleshooting 86
checks
drum rotation 109
half-self-test 107
high-voltage power supply 110
print cartridge 93
circuit capacity specifications 7
circuit diagram 113
circuitry, power system 44
classes, HP Technical Training
116
cleaning
high-voltage connection points
111
high-voltage contacts 110
outside of printer 25
pickup roller 29
print cartridge area 26
print path 26
cleaning stage, image formation
process 47
clipped pages, troubleshooting 94
cloth, toner 117
Coldfire processor 39
communication operations 39
complex pages, printing 40
conditioning stage, image
formation process 46
connection points
high-voltage power supply 111
print cartridge 110
consumables
life expectancies 24
ordering 116
control panel
buttons 15
lights 15, 88
operations 39
troubleshooting 86
controller PCA 42
origin, identifying 5
covers, removing
front 71
left side 66
rear 66
right side 64
CPU, formatter 39
crooked pages, troubleshooting
101, 105
curl, troubleshooting 101, 105
Customer Care Online 116
cut-off edges 94
D
data communication operations 39
dc bias
46
dc controller PCA 42
dc power distribution 44
delay jams 49
delivery sensor, paper (PS803)
feeding operations 47
ENWW Index 129
jam detection operations 49
delivery tray assembly, part number
123, 124, 126
delivery tray extension, replacing
36, 63
delivery-delay jams 49
delivery-stationary jams 49
density
operations 44
troubleshooting 96
developing roller 44
developing stage, image formation
process 46
dimensions, printer 6
dimensions, product 14
documentation
ordering 116
dots, troubleshooting 95, 102
dpi, specifications 5
draft mode 39
DRAM, formatter 39
drivers, ordering 116
dropouts, troubleshooting 96, 100
drum
inspecting 93
operations 46, 47
rotation functional check 109
drum cleaning stage, image
formation process 47
duty cycle 5
dynamic random access memory
(DRAM), formatter 39
E
EconoMode 39
ECU
jam detection operations 49
laser/scanner operations 43
operations 42
paper feeding operations 47
removing 80
sequence of operations 51
edges, not printing 94
electrical specifications 7
electrophotographic processes
operations 45, 46
testing 107
electrostatic discharge (ESD),
precautions for 54
element, heating 47
engine control unit. See ECU
engine power assembly
power system 44
engine power assembly, removing
75
Enhanced I/O 40
envelopes
loading 21
specifications 18
environmental specifications 6, 14
errors, control panel lights
HP LaserJet 1018 printer 88
ESD (electrostatic discharge),
precautions for 54
exchange, printer 119
exit rollers, fuser assembly 47
extended service plan 9
F
faded areas, troubleshooting 103
fasteners, types of 118
features
firmware 5
hardware 2
feed assembly drive rollers 47
feed system, paper 47
feeding problems, troubleshooting
105
field replaceable units (FRUs) 118
Finland, laser safety statement for
12
firmware features 5
fixing assembly. See fuser
assembly
flowchart, troubleshooting 86
focusing lenses, operations 46
formatter
operations 39
sequence of operations 51
front cover, removing 71
fuser assembly
exit rollers 47
life expectancy 24
operations 47
removing 77
temperature, adjusting 98
fuser cover, removing 66
fuses, overcurrent protection
(F101, F102) 44
fusing stage, image formation
process 47
G
Go light and button 15
gray background, troubleshooting
97
H
half-self-test functional check 107
hardware features 2
hardware maintenance
agreements
9
heating element operations 47
heavy media specifications 20
high-voltage power supply
connector assembly, checking
111
operations 44
testing 110
HP Customer Care Online 116
HP LaserJet 1018 printer
lights, control panel 88
part number, exchange 119
parts, locating 3
HP Technical Training 116
humidity
specifications 6
I
I/O, Enhanced 40
idle mode, power consumption 7
image density
troubleshooting 96
voltage operations 44
image formation process
operations 45, 46
testing 107
image quality, troubleshooting
about 93
blank pages 93
characters, misprinted 100
curled paper 101, 105
dropouts 96
faded areas 103
gray background 97
lines 97
loose toner 98
repetitive defects 100
repetitive image defect ruler
112
130 Index ENWW
scattered toner 102
skewed pages 101, 105
smears 98
specks 95
water droplets 104
white stripes 102
wrinkled pages 103
input tray
capacity 5
jams, clearing 90
loading media 21
locating 3
media sizes supported 16
multifeeds 106
replacing 35, 62
INTR (Initial Rotation Period) 51
J
jams
clearing 90
detection operations 49
frequent 106
K
Korean EMI statement 11
L
labels
loading 21
specifications 18
laser safety statement 11
laser/scanner assembly
operations 43
precautions 54
removing 84
LaserJet 1018 printer
lights, control panel 88
part number, exchange 119
parts, locating 3
latent electrostatic image 46
leading edge
detection operations 49
leading edge detection operations
47
left side cover, removing 66
lenses, operations 46
letterhead
loading 21
specifications 17
life expectancies
extending print cartridge 39
recycling used print cartridges
10
supplies 24
lift plate operations 47
lights, control panel
HP LaserJet 1018 patterns 88
locating 15
lines, troubleshooting 97, 102
loading media 21
loose toner, troubleshooting 98
LSTR (Last Rotation Period) 51
M
machine screws 118
main input tray
capacity 5
feeding operations 47
feeding problems,
troubleshooting 106
jams, clearing 90
loading 21
locating 3
media sizes supported 16
replacing 35, 62
main wiring diagram 113
maintenance agreements 9
manual feed tray. See priority
input tray
manuals
ordering 116
margins, minimum 94
media
breaking reams 106
capacity 5
curled 101, 105
envelopes 18, 21
heavy 20
jam detection operations 49
jams, clearing 90
labels 18, 21
letterhead 17, 21
loading 21
margins, minimum 94
multifeeds 106
sizes supported 16
specifications 16
storing 105
transparencies 17, 21
troubleshooting 17
type, setting 22
wrinkled 103
memory
buffer 40
formatter 39
Memory Enhancement technology
(MEt) 5, 39
mirror operations 46
misalignment, troubleshooting
101, 105
model number 5
models, features 2
motor
operations 42
multifeeds
replacing separation pad 33, 60
tr
oubleshooting 106
N
noise specifications 8
NVRAM
operations 39
O
on/off switch, locating 4
Online Customer Care, HP 116
operating environment,
specifications 6, 14
operations
ECU 42
formatter 39
image formation 45
jam detection 49
laser/scanner 43
motor 42
overcurrent/overvoltage
protection 44
paper feeding 47
sequence of 51
systems 38
ordering parts and supplies 116
output bin
capacity 5
jams, clearing 90
locating 3
output path
cleaning 26
operations 47
output-bin extension, replacing
36, 63
ENWW Index 131
overcurrent/overvoltage protection
44
P
Page Protect 40
pages per minute 5, 6
paper
breaking reams 106
capacity 5
curled 101, 105
heavy 20
jam detection operations 49
jams, clearing 90
loading 21
margins, minimum 94
multifeeds 106
sizes supported 16
specifications 16
storing 105
troubleshooting 17
type, setting 22
wrinkled 103
paper delivery sensor (PS803)
feeding operations 47
jam detection operations 49
paper feed problems,
troubleshooting 105
paper feed system 47
paper lift plate operations 47
paper pickup assembly
removing 79
paper size settings 94
paper top sensor (PS801) 47, 49
paper-out sensor (PS201) 47, 49
part numbers
accessories 117
delivery tray assembly 123,
124, 126
pickup roller 123, 124, 126
printer exchange 119
separation pad assembly
123, 125, 126
voltage 118
partial characters, troubleshooting
96, 100
parts
ordering 116
removing and replacing 54
user-replaceable 30, 57
parts removal order 56
path
feeding operations 47, 48
print, cleaning 26
photosensitive drum
inspecting 93
operations 46, 47
rotation functional checks 109
photosensors
jam detection operations 49
locating 50, 114
paper feed system 47
physical specifications 6
pickup delay jams 49
pickup roller
cleaning 29
operations 47
part number 123, 124, 126
replacing 30, 57
pickup solenoid (SL001)
locating 50, 114
operations 47, 49
pickup stationary jam 49
pliers, required 54
ports
communication operations 39
power
control operations 42
specifications 7
power receptacle, locating 4
power supplies
disconnecting 54
engine power assembly 44
removing 75
testing high-voltage 110
power switch, locating 4
ppm (pages per minute) 5, 6
preservice checklist 54
pressure roller, operations 47
primary charging roller
operations 46
power supply 44
print cartridge area, cleaning 26
print cartridge door
locating 3
removing 66
print cartridges
checking 93, 110
drum rotation check 109
extending life of 39
life expectancies 24
operations 46, 47
part numbers 117
recycling 10
redistributing toner 93
refilled 10
removing 55
print density
troubleshooting 96
voltage operations 44
print path
cleaning 26
feeding operations 47, 48
PRINT period
51
print quality, troubleshooting
about 93
blank pages 93
characters, misprinted 100
curled paper 101, 105
dropouts 96
faded areas 103
gray background 97
lines 97
loose toner 98
repetitive defects 100
repetitive image defect ruler
112
scattered toner 102
skewed pages 101, 105
smears 98
specks 95
water droplets 104
white stripes 102
wrinkled pages 103
printer drivers, ordering 116
printer exchange 119
printer separation pad
life expectancy 24
locating 4
operations 47
part number 123, 125, 126
replacing 33, 60
printing
loading media 21
troubleshooting 87
printing, troubleshooting 105
priority feed slot
capacity 5
feeding operations 47
loading 21
locating 3
132 Index ENWW
priority input slot
feeding problems,
troubleshooting 106
processor, formatter 39
production code 5
Q
quality, troubleshooting
about 93
blank pages 93
characters, misprinted 100
curled paper 101, 105
dropouts 96
faded areas 103
gray background 97
lines 97
loose toner 98
repetitive defects 100
repetitive image defect ruler
112
scattered toner 102
skewed pages 101, 105
smears 98
specks 95
water droplets 104
white stripes 102
wrinkled pages 103
R
RAM
formatter 39
Ready light
locating 15
reams, breaking 106
rear panel, removing 66
recycling print cartridges 10
redistributing toner 93
reduction settings 94
refilled print cartridges 10
regulatory statements 11
removing
ECU 80
engine power assembly 75
front cover 71
fuser assembly 77
fuser cover 66
laser/scanner assembly 84
left side cover 66
order of 56
paper pickup assembly 79
parts 54
power assembly 75
print cartridge 55
print cartridge door 66
rear panel 66
right side cover 64
transfer roller assembly 73
repetitive defects, troubleshooting
100, 112
replacement intervals
extending print cartridge 39
recycling used print cartridges
10
supplies 24
replacing
field replaceable units (FRUs)
118
main input tray 35, 62
order of 56
output-bin extension 36, 63
parts 54
pickup roller 30, 57
separation pad 33, 60
replacing parts 30
residual paper jams 49
Resolution Enhancement
technology (REt) 5
resolution, specifications 5
revision level 5
right side cover, removing 64
rollers
cleaning pickup 29
image formation operations 45
paper feeding operations 47
part numbers 123, 124, 126
power supply 44
repetitive image defect ruler
112
replacing pickup 30, 57
transfer, cleaning near 25
transfer, removing 73
rotation test 109
ruler, repetitive defect 112
S
scanning exposure stage, image
formation process 46
scatter, toner 102
schedules, HP Technical Training
116
screwdrivers, required 54
screws
self-tapping 54
types of 118
sensors
jam detection operations 49
locating 50, 114
paper feed system 47
separation pad
life expectancies 24
operations 47
part number 123, 125, 126
replacing 33, 60
separation stage, image formation
process 46
serial number 5
service plan
extended
9
signals, VIDEO 51
size
margins, minimum 94
printer 6, 14
sizes
media 16
skew, troubleshooting 101, 105
smears
troubleshooting 98
smears, toner 98
software
installation, troubleshooting 87
ordering 116
solenoid (SL001)
locating 50, 114
operations 47, 49
space requirements 6, 14
specifications
acoustic emissions 8
card stock 20
electrical 7
envelopes 18
labels 18
letterhead 17
media 16
physical 6
transparencies 17
specks, toner 95, 102
speed
data transfer 40
printing 5, 6
processor 39
ENWW Index 133
spots
troubleshooting 98
stages, image formation 46, 107
static eliminator, operations 46
static precautions 54
stationary jams 49
status information, relaying 39
STBY (Standby) period 51
storage environment, specifications
6
storing paper 105
stripes, vertical white 102
supplies
life expectancies 24
ordering 116
support, technical 116
T
teardown tree 56
technical support 116
Technical Training 116
temperature
fuser settings 98
specifications 6
storing paper 105
tests
drum rotation 109
half-self functional check 107
high-voltage power supply 110
text, troubleshooting 96, 100
timing diagram, general 52
toner
cloth, ordering 117
image formation operations 46
loose, troubleshooting 98
redistributing 93
scattered, troubleshooting 102
smears, troubleshooting 98
specks, troubleshooting 95,
102
waste cleaning operations 47
toner cartridges. See print
cartridges
tools, required 54
top-cover assembly, removing 66
trailing edge, detection 49
Training, HP Technical 116
transfer roller
cleaning around 25
operations 46
power supply 44
removing 73
transfer stage, image formation
process 46
transparencies
cleaning print path with 26
loading 21
specifications 17
trays
capacities 5
jams, clearing 90
loading media 21
locating 3
media sizes supported 16
multifeeds 106
replacing 35, 62
troubleshooting
basic 86
blank pages 93
characters, misprinted 100
control panel 86
control panel lights 88
curled paper 101, 105
dropouts 96
drum rotation check 109
faded areas 103
feeding problems 105
half self-test 107
jams, clearing 90
lines 97
loose toner 98
media 17
multifeeds 106
print cartridges 93
print quality 93
printing 87
repetitive image defect ruler
112
scattered toner 102
skewed pages 101, 105
smeared toner 98
smears 98
software installation 87
specks 95
spots 98
water droplets 104
white stripes 102
wrinkled pages 103
two-way communications 39
type, setting media 22
U
unplugging printer 54
USB port
locating 4
operations 39
user-replaceable parts 30, 57
V
vacuums, cautions against 26
ventilation requirements 14
vertical defects, troubleshooting
100
vertical lines, troubleshooting 97
vertical white stripes,
t
roubleshooting 102
VIDEO signals 51
voltage
high-voltage power supply 44
overvoltage protection 44
part numbers 118
power supplies 44
W
WAIT period 51
warranty
refilled cartridges, impact on 10
waste toner receptacle 47
water on pages, troubleshooting
104
wave, troubleshooting 101, 105
websites, ordering parts 116
weight
print cartridge 93
wiring diagram 113
wrapping jams 49
wrinkled pages, troubleshooting
103, 105
writing stage, image formation
process 46
134 Index ENWW
*CB419-90938*
*CB419-90938*
CB419-90938
© 2006 Hewlett-Packard Development Company, L.P.
www.hp.com
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